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Li J, Zheng X. Morphology, Histology, and Transcriptome Analysis of Gonadal Development in Octopus minor (Sasaki, 1920). MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2023; 25:1043-1056. [PMID: 37878213 DOI: 10.1007/s10126-023-10258-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/09/2023] [Indexed: 10/26/2023]
Abstract
Octopus minor is an economically important species, but little is known about the histological pattern and regulatory mechanisms during gonadal development. In this study, we investigated the annual changes in total body weight (TW), gonad somatic index (GSI), gonadal histological features, and transcriptome of O. minor. The results indicated that both females and males showed a similar TW trend. The GSI peaked in June in females, while it remained constant at around 3% in males. Nine and four histological stages were observed in ovaries and testes, respectively. Our field sampling results implied that O. minor might have overwintering periods for both eggs and larvae. Transcriptome analysis revealed that a total of 1095 and 2468 genes were significantly expressed during ovarian and testicular development, separately. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis displayed that 126 GO terms and 5 KEGG pathways were significantly enriched in the ovarian group of advanced vitellogenic oocytes vs vitellogenic oocytes (AVO vs VO). The pathways "Ribosomal", "Cell cycle", and "Progesterone-mediated oocyte maturation" were predicted to promote yolk deposition. Additionally, the testicular comparison group of spent vs mature (Spent vs Mature) showed significant enrichment in 674 GO terms and 13 KEGG pathways, suggesting that energy metabolism and cell repair pathways may be involved in the spermatogenesis process. This work revealed the development process of the gonads and shed light on the potential regulatory pathways of O. minor, providing novel insights and laying a molecular basis for artificial breeding.
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Affiliation(s)
- Jiahua Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China
- Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, China
| | - Xiaodong Zheng
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China.
- Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, China.
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2
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Ventura-López C, López-Galindo L, Rosas C, Sánchez-Castrejón E, Galindo-Torres P, Pascual C, Rodríguez-Fuentes G, Juárez OE, Galindo-Sánchez CE. Sex-specific role of the optic gland in octopus maya: A transcriptomic analysis. Gen Comp Endocrinol 2022; 320:114000. [PMID: 35217062 DOI: 10.1016/j.ygcen.2022.114000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 12/17/2021] [Accepted: 02/15/2022] [Indexed: 12/12/2022]
Abstract
The optic glands (OG) of cephalopods are a source of molecules associated with the control of reproductive traits and lifecycle events such as sexual maturation, reproductive behavior, feeding, parental care, and senescence. However, little is known about the role of the optic gland in Octopus maya adults during mating and egg laying. RNA sequencing, de novo transcriptome assembly, ubiquity and differential expression analysis were performed. First, we analyzed the expression patterns of transcripts commonly associated with OG regulatory functions to describe their possible role once the maturation of the gonad is complete. The transcriptomic profiles of the optic gland of both sexes were compared with emphasis on the signaling pathways involved in the dimorphism of reproductive traits. Results suggest that in the OG of males, the reproductive condition (mated or non-mated) did not affect the general expression profile. In contrast, more differentially expressed genes were observed in females. In mated females, the mRNA metabolic process and the response to norepinephrine were enriched, suggesting a high cellular activity in preparation for the laying of the embryos. Whereas in egg-laying females, energetic and metabolic processes were the most represented, including the oxidation-reduction process. Finally, the gene expression patterns in senescence females suggest a physiological response to starvation as well as upregulation of genes involved retrotransposon activity. In conclusion, more substantial fluctuations in gene expression were observed in the optic glands of the fertilized females compared to the males. Such differences might be associated with the regulation of the egg-laying and the onset of senescence.
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Affiliation(s)
- Claudia Ventura-López
- Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Tijuana - Ensenada No. 3918, Zona Playitas, Ensenada, Baja California CP 22860, México.
| | - Laura López-Galindo
- Instituto de Investigaciones Oceanológicas (IIO), Universidad Autónoma de Baja California (UABC), Carretera Ensenada-Tijuana No. 3917, Fraccionamiento Playitas, Ensenada, Baja California CP 22860, Mexico
| | - Carlos Rosas
- Unidad Multidisciplinaria de Docencia e Investigación (UMDI), Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Puerto de Abrigo s/n, Sisal, Hunucma, Yucatan CP97355, Mexico
| | - Edna Sánchez-Castrejón
- Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Tijuana - Ensenada No. 3918, Zona Playitas, Ensenada, Baja California CP 22860, México.
| | - Pavel Galindo-Torres
- Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Tijuana - Ensenada No. 3918, Zona Playitas, Ensenada, Baja California CP 22860, México.
| | - Cristina Pascual
- Unidad Multidisciplinaria de Docencia e Investigación (UMDI), Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Puerto de Abrigo s/n, Sisal, Hunucma, Yucatan CP97355, Mexico
| | - Gabriela Rodríguez-Fuentes
- Unidad de Química en Sisal, Facultad de Química Universidad Nacional Autónoma de México (UNAM), Puerto de Abrigo s/n, Sisal, Hunucma, Yucatan CP97355, Mexico
| | - Oscar E Juárez
- Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Tijuana - Ensenada No. 3918, Zona Playitas, Ensenada, Baja California CP 22860, México.
| | - Clara E Galindo-Sánchez
- Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Tijuana - Ensenada No. 3918, Zona Playitas, Ensenada, Baja California CP 22860, México.
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Roumbedakis K, Alexandre MN, Puch JA, Martins ML, Pascual C, Rosas C. Short and Long-Term Effects of Anesthesia in Octopus maya (Cephalopoda, Octopodidae) Juveniles. Front Physiol 2020; 11:697. [PMID: 32695019 PMCID: PMC7338579 DOI: 10.3389/fphys.2020.00697] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 05/28/2020] [Indexed: 11/13/2022] Open
Affiliation(s)
- Katina Roumbedakis
- AQUOS – Aquatic Organisms Health Laboratory, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Florianopolis, Brazil
- *Correspondence: Katina Roumbedakis,
| | - Marina N. Alexandre
- AQUOS – Aquatic Organisms Health Laboratory, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Florianopolis, Brazil
| | - José A. Puch
- Unidad Mulidisicplinaria de Docencia e Investigación, Facultad de Ciencias, Universdidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Maurício L. Martins
- AQUOS – Aquatic Organisms Health Laboratory, Department of Aquaculture, Federal University of Santa Catarina (UFSC), Florianopolis, Brazil
| | - Cristina Pascual
- Unidad Mulidisicplinaria de Docencia e Investigación, Facultad de Ciencias, Universdidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Carlos Rosas
- Unidad Mulidisicplinaria de Docencia e Investigación, Facultad de Ciencias, Universdidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
- Carlos Rosas,
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Gonadal sex differentiation and development during early ontogenesis in the breeding kisslip cuttlefish ( Sepia lycidas). Heliyon 2019; 5:e01948. [PMID: 31338455 PMCID: PMC6606992 DOI: 10.1016/j.heliyon.2019.e01948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/15/2019] [Accepted: 06/07/2019] [Indexed: 12/16/2022] Open
Abstract
To understand and obtain basic information on sex differentiation in the kisslip cuttlefish (Sepia lycidas), the gonadal sex differentiation process was investigated histologically. An undifferentiated gonad consisting of germ cells and somatic cells was found to form at a caudal site in the space between the internal yolk sacks of cuttlefish embryos at 14 and 21 days after spawning (DAS). Sexual dimorphism in the gonad was first detected at around 28 DAS. Meiotic oocytes were observed as the first visible morphological characteristic of ovaries in the gonads of some cuttlefish embryos at 28 DAS. In other individuals, neither meiotic germ cells, nor the appearance of a testicular structure, were observed in the gonad even after 10 days post hatching (DPH). Seminiferous tubules, consisting of a small number of spermatogonia and a surrounding basement membrane, were the first visible morphological characteristic of the testis in the male gonad, detected at around 20 DPH. This is the third report on the gonadal sex differentiation process in cephalopods.
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López-Galindo L, Juárez OE, Larios-Soriano E, Del Vecchio G, Ventura-López C, Lago-Lestón A, Galindo-Sánchez C. Transcriptomic Analysis Reveals Insights on Male Infertility in Octopus maya Under Chronic Thermal Stress. Front Physiol 2019; 9:1920. [PMID: 30697164 PMCID: PMC6341066 DOI: 10.3389/fphys.2018.01920] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 12/20/2018] [Indexed: 11/25/2022] Open
Abstract
Octopus maya endemic to the Yucatan Peninsula, Mexico, is an ectotherm organism particularly temperature-sensitive. Studies in O. maya females show that temperatures above 27°C reduce the number of eggs per spawn, fertilization rate and the viability of embryos. High temperatures also reduce the male reproductive performance and success. However, the molecular mechanisms are still unknown. The transcriptomic profiles of testes from thermally stressed (30°C) and not stressed (24°C) adult male octopuses were compared, before and after mating to understand the molecular bases involved in the low reproductive performance at high temperature. The testis paired-end cDNA libraries were sequenced using the Illumina MiSeq platform. Then, the transcriptome was assembled de novo using Trinity software. A total of 53,214,611 high-quality paired reads were used to reconstruct 85,249 transcripts and 77,661 unigenes with an N50 of 889 bp length. Later, 13,154 transcripts were annotated implementing Blastx searches in the UniProt database. Differential expression analysis revealed 1,881 transcripts with significant difference among treatments. Functional annotation and pathway mapping of differential expressed transcripts revealed significant enrichment for biological processes involved in spermatogenesis, gamete generation, germ cell development, spermatid development and differentiation, response to stress, inflammatory response and apoptosis. Remarkably, the transcripts encoding genes such as ZMYND15, KLHL10, TDRD1, TSSK2 and DNAJB13, which are linked to male infertility in other species, were differentially expressed among the treatments. The expression levels of these key genes, involved in sperm motility and spermatogenesis were validated by quantitative real-time PCR. The results suggest that the reduction in male fertility at high temperature can be related to alterations in spermatozoa development and motility.
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Affiliation(s)
- Laura López-Galindo
- Laboratorio de Genómica Funcional, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
| | - Oscar E Juárez
- Laboratorio de Genómica Funcional, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
| | - Ernesto Larios-Soriano
- Laboratorio de Fisiología Integrativa de Organismos Marinos, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
| | - Giulia Del Vecchio
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Claudia Ventura-López
- Laboratorio de Genómica Funcional, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
| | - Asunción Lago-Lestón
- Departamento de Innovación Biomédica, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
| | - Clara Galindo-Sánchez
- Laboratorio de Genómica Funcional, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
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6
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Guillén-Hernández S, González-Salas C, Pech-Puch D, Villegas-Hernández H. Octopus maya parasites off the Yucatán Peninsula, Mexico. II. Salivary gland damage by cestodes. DISEASES OF AQUATIC ORGANISMS 2018; 130:45-50. [PMID: 30154271 DOI: 10.3354/dao03252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The red octopus Octopus maya Voss et Solís-Ramírez, 1966 is an endemic species and one of the most important fishery resources of the Yucatán Peninsula, Mexico. Due to its economic importance and the fact that in recent years interest in farming this species has increased, several initiatives have been implemented to study its biology and requirements for cultivation. Parasites represent an important component of the biology of the red octopus, as they can have an impact on both wild and cultivated populations. A total of 44 O. maya specimens were sampled from the fishing ports of Ría Lagartos and Dzilam de Bravo, Yucatán; specimens were measured and subsequently subjected to histological analysis of the buccal masses where cestode larvae (Prochristianella sp.) were found in the anterior salivary glands. Results of a chi-squared test showed that specimen size class and infestation levels (parasite abundance) were significantly correlated, with parasite damage levels more pronounced in larger animals. The damage caused to the anterior salivary glands by this parasite could have serious implications for feeding and reproductive success of O. maya.
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Affiliation(s)
- S Guillén-Hernández
- Universidad Autónoma de Yucatán, Campus de Ciencias Biológicas y Agropecuarias, Departamento de Biología Marina, Km. 15.5 Carretera Mérida-Xmatkuil, Apdo. Postal 4-116, Itzimná Mérida, Yucatán, México
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Avila-Poveda OH, Koueta N, Benítez-Villalobos F, Santos-Valencia J, Rosas C. Reproductive traits ofOctopus maya(Cephalopoda: Octopoda) with implications for fisheries management. MOLLUSCAN RESEARCH 2016. [DOI: 10.1080/13235818.2015.1072912] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Avila-Poveda OH, Montes-Pérez RC, Koueta N, Benítez-Villalobos F, Ramírez-Pérez JS, Jimenez-Gutierrez L, Rosas C. Seasonal changes of progesterone and testosterone concentrations throughout gonad maturation stages of the Mexican octopus,Octopus maya(Octopodidae: Octopus). MOLLUSCAN RESEARCH 2015. [DOI: 10.1080/13235818.2015.1045055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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López-Peraza DJ, Hernández-Rodríguez M, Barón-Sevilla B. Ontogeny of the digestive system of the Octopus bimaculatus paralarvae (Verril, 1883). SPRINGERPLUS 2014; 3:22. [PMID: 24683531 PMCID: PMC3967737 DOI: 10.1186/2193-1801-3-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 12/17/2013] [Indexed: 11/10/2022]
Abstract
The high mortalities registered in the larval stage during octopus culturing are mainly due to nutritional deficiencies of the food provided. To understand the cause of this problem, we studied the ontogenetic development of the digestive system of Octopus bimaculatus paralarvae. An egg batch was obtained from a gravid female collected in the Bay of Los Angeles, Baja California, Mexico, and it was incubated in the laboratory during the summer of 2011. We observed that the formation of the digestive system began at 33 days post-laying (DPL). The newly hatched paralarvae had already formed the organs involved in food ingestion and digestion, although it was not possible to know accurately their degree of maturity. The present research constitutes the first description at the histological level of the ontogenic development of the digestive system of the O. bimaculatus paralarvae. This serves as a basis for future studies of the digestive physiology of this species.
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Affiliation(s)
- Diana Judith López-Peraza
- Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Baja California, Mexico
| | - Mónica Hernández-Rodríguez
- Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Baja California, Mexico
| | - Benjamín Barón-Sevilla
- Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Baja California, Mexico
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10
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Vidal EAG, Villanueva R, Andrade JP, Gleadall IG, Iglesias J, Koueta N, Rosas C, Segawa S, Grasse B, Franco-Santos RM, Albertin CB, Caamal-Monsreal C, Chimal ME, Edsinger-Gonzales E, Gallardo P, Le Pabic C, Pascual C, Roumbedakis K, Wood J. Cephalopod culture: current status of main biological models and research priorities. ADVANCES IN MARINE BIOLOGY 2014; 67:1-98. [PMID: 24880794 DOI: 10.1016/b978-0-12-800287-2.00001-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A recent revival in using cephalopods as experimental animals has rekindled interest in their biology and life cycles, information with direct applications also in the rapidly growing ornamental aquarium species trade and in commercial aquaculture production for human consumption. Cephalopods have high rates of growth and food conversion, which for aquaculture translates into short culture cycles, high ratios of production to biomass and high cost-effectiveness. However, at present, only small-scale culture is possible and only for a few species: the cuttlefish Sepia officinalis, the loliginid squid Sepioteuthis lessoniana and the octopuses Octopus maya and O. vulgaris. These four species are the focus of this chapter, the aims of which are as follows: (1) to provide an overview of the culture requirements of cephalopods, (2) to highlight the physical and nutritional requirements at each phase of the life cycle regarded as essential for successful full-scale culture and (3) to identify current limitations and the topics on which further research is required. Knowledge of cephalopod culture methods is advanced, but commercialization is still constrained by the highly selective feeding habits of cephalopods and their requirement for large quantities of high-quality (preferably live) feed, particularly in the early stages of development. Future research should focus on problems related to the consistent production of viable numbers of juveniles, the resolution of which requires a better understanding of nutrition at all phases of the life cycle and better broodstock management, particularly regarding developments in genetic selection, control of reproduction and quality of eggs and offspring.
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Affiliation(s)
- Erica A G Vidal
- Center for Marine Studies, University of Parana (UFPR), Parana, Brazil.
| | | | - José P Andrade
- CCMAR-CIMAR L.A., Centro de Ciencias do Mar do Algarve, Campus de Gambelas, Universidade doAlgarve, Faro, Portugal
| | - Ian G Gleadall
- International Fisheries Science Unit, Graduate School of Agricultural Sciences, Tohoku University, Sendai, Japan
| | - José Iglesias
- Oceanographic Center of Vigo. Spanish Institute of Oceanography, Subida a Radio Faro, Pontevedra, Spain
| | - Noussithé Koueta
- UMR BOREA, MNHN, UPMC, UCBN, CNRS-7028, IRD-207, IBFA Université de Caen Basse-Normandie, Esplanade de la Paix, Caen cedex, France
| | - Carlos Rosas
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | - Susumu Segawa
- Tokyo University of Fisheries, Minato-ku, Tokyo, Japan
| | - Bret Grasse
- Monterey Bay Aquarium, Monterey, California, USA
| | | | - Caroline B Albertin
- Department of Organismal Biology and Anatomy, University of Chicago, Chicago, Illinois, USA
| | - Claudia Caamal-Monsreal
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | - Maria E Chimal
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | | | - Pedro Gallardo
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | - Charles Le Pabic
- UMR BOREA, MNHN, UPMC, UCBN, CNRS-7028, IRD-207, IBFA Université de Caen Basse-Normandie, Esplanade de la Paix, Caen cedex, France
| | - Cristina Pascual
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | - Katina Roumbedakis
- Laboratório Sanidade de Organismos Aquáticos. Universidade Federal de Santa Catarina, Florianopolis, Brazil
| | - James Wood
- Mounts Botanical Garden, West Palm Beach, Florida, USA
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Avila-Poveda OH, Montes-Pérez RC, Benitez-Villalobos F, Rosas C. Development and Validation of a Solid-Phase Radioimmunoassay for Measuring Progesterone and Testosterone in Octopus Gonad Extracts. MALACOLOGIA 2013. [DOI: 10.4002/040.056.0209] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Avila-Poveda OH, Abadia-Chanona QY. Emergence, development, and maturity of the gonad of two species of chitons "sea cockroach" (Mollusca: Polyplacophora) through the early life stages. PLoS One 2013; 8:e69785. [PMID: 23936353 PMCID: PMC3732295 DOI: 10.1371/journal.pone.0069785] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 06/12/2013] [Indexed: 11/25/2022] Open
Abstract
This study describes and recognises, using histological and microscopical examinations on a morphometrical basis, several gonad traits through the early life stages of Chiton articulatus and C. albolineatus. Gonadal ontogenesis, gonad development stages, sexual differentiation, onset of the first sexual maturity, and growth sequences or "early life stages" were determined. In addition, allometry between lengths and body weight pooled for both sexes per each chiton were calculated using equation Y = aX(b) . A total of 125 chitons (4≤TL≤40 mm, in total length "TL") were used. All allometric relations showed a strong positive correlation (r), close to 1, with b-values above three, indicating an isometric growth. Gonadal ontogenesis and gonad development stages were categorised into three periods ("Pw" without gonad, "Pe" gonad emergence, and "Pf" gonadal sac formed) and four stages ("S0" gametocytogenesis, "S1" gametogenesis, "S2" mature, and "S3" spawning), respectively. Compound digital images were attained for each process. Periods and stages are overlapped among them and between species, with the following overall confidence intervals in TL: Pw 6.13-14.32 mm, Pe 10.32-16.93 mm, Pf 12.99-25.01 mm, S0 16.08-24.34 mm (females) and 19.51-26.60 mm (males), S1 27.15-35.63 mm (females) and 23.45-32.27 mm (males), S2 24.48-40.24 mm (females) and 25.45-32.87 mm (males). Sexual differentiation (in S0) of both chitons occurs first as a female then as a male; although, males reach the onset of the first sexual maturity earlier than females, thus for C. articulatus males at 17 mm and females at 32 mm, and for C. albolineatus males at 23.5 mm and females at 28 mm, all in TL. Four early life stages (i.e., subjuvenile, juvenile, subadult, and adult) are described and proposed to distinguish growth sequences. Our results may be useful to diverse disciplines, from developmental biology to fisheries management.
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13
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Thermopreference, tolerance and metabolic rate of early stages juvenile Octopus maya acclimated to different temperatures. J Therm Biol 2013; 38:14-9. [DOI: 10.1016/j.jtherbio.2012.09.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 08/23/2012] [Accepted: 09/24/2012] [Indexed: 11/24/2022]
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14
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Herwig JN, Depczynski M, Roberts JD, Semmens JM, Gagliano M, Heyward AJ. Using age-based life history data to investigate the life cycle and vulnerability of Octopus cyanea. PLoS One 2012; 7:e43679. [PMID: 22912898 PMCID: PMC3422261 DOI: 10.1371/journal.pone.0043679] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 07/26/2012] [Indexed: 12/02/2022] Open
Abstract
Octopus cyanea is taken as an unregulated, recreationally fished species from the intertidal reefs of Ningaloo, Western Australia. Yet despite its exploitation and importance in many artisanal fisheries throughout the world, little is known about its life history, ecology and vulnerability. We used stylet increment analysis to age a wild O. cyanea population for the first time and gonad histology to examine their reproductive characteristics. O. cyanea conforms to many cephalopod life history generalisations having rapid, non-asymptotic growth, a short life-span and high levels of mortality. Males were found to mature at much younger ages and sizes than females with reproductive activity concentrated in the spring and summer months. The female dominated sex-ratios in association with female brooding behaviours also suggest that larger conspicuous females may be more prone to capture and suggests that this intertidal octopus population has the potential to be negatively impacted in an unregulated fishery. Size at age and maturity comparisons between our temperate bordering population and lower latitude Tanzanian and Hawaiian populations indicated stark differences in growth rates that correlate with water temperatures. The variability in life history traits between global populations suggests that management of O. cyanea populations should be tailored to each unique set of life history characteristics and that stylet increment analysis may provide the integrity needed to accurately assess this.
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Affiliation(s)
- Jade N. Herwig
- The Oceans Institute, University of Western Australia, Perth, Western Australia, Australia
| | - Martial Depczynski
- The Oceans Institute, University of Western Australia, Perth, Western Australia, Australia
- Australian Institute of Marine Science, The Oceans Institute, University of Western Australia, Perth, Western Australia, Australia
- * E-mail:
| | - John D. Roberts
- Centre for Evolutionary Biology, School of Animal Biology, The University of Western Australia, Perth, Western Australia, Australia
| | - Jayson M. Semmens
- Institute for Marine and Antarctic Research, Fisheries, Aquaculture and Coasts Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - Monica Gagliano
- Centre for Evolutionary Biology, School of Animal Biology, The University of Western Australia, Perth, Western Australia, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Andrew J. Heyward
- The Oceans Institute, University of Western Australia, Perth, Western Australia, Australia
- Australian Institute of Marine Science, The Oceans Institute, University of Western Australia, Perth, Western Australia, Australia
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Yu Y, Xu T, Yu Y, Hao P, Li X. Association of tissue lineage and gene expression: conservatively and differentially expressed genes define common and special functions of tissues. BMC Bioinformatics 2010; 11 Suppl 11:S1. [PMID: 21172044 PMCID: PMC3024865 DOI: 10.1186/1471-2105-11-s11-s1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Embryogenesis is the process by which the embryo is formed, develops, and establishes developmental hierarchies of tissues. The recent advance in microarray technology made it possible to investigate the tissue specific patterns of gene expression and their relationship with tissue lineages. This study is focused on how tissue specific functions, tissue lineage, and cell differentiation are correlated, which is essential to understand embryonic development and organism complexity. RESULTS We performed individual gene and gene set based analysis on multiple tissue expression data, in association with the classic topology of mammalian fate maps of embryogenesis. For each sub-group of tissues on the fate map, conservatively, differentially and correlatively expressed genes or gene sets were identified. Tissue distance was found to correlate with gene expression divergence. Tissues of the ectoderm or mesoderm origins from the same segments on the fate map shared more similar expression pattern than those from different origins. Conservatively expressed genes or gene sets define common functions in a tissue group and are related to tissue specific diseases, which is supported by results from Gene Ontology and KEGG pathway analysis. Gene expression divergence is larger in certain human tissues than in the mouse homologous tissues. CONCLUSION The results from tissue lineage and gene expression analysis indicate that common function features of neighbor tissue groups were defined by the conservatively expressed genes and were related to tissue specific diseases, and differentially expressed genes contribute to the functional divergence of tissues. The difference of gene expression divergence in human and mouse homologous tissues reflected the organism complexity, i.e. distinct neural development levels and different body sizes.
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Affiliation(s)
- Yao Yu
- Key Lab of Systems Biology/Key Laboratory of Synthetic Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
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