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| Format: | Artículo científico |
| Langue: | en |
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Universidad de Costa Rica
2017
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=44954192004 https://www.redalyc.org/journal/449/44954192004/ https://www.redalyc.org/journal/449/44954192004/html/ https://www.redalyc.org/journal/449/44954192004/44954192004.epub https://www.redalyc.org/journal/449/44954192004/movil |
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Table des matières:
- Reproduction of Megapitaria squalida (Bivalvia: Veneridae) in the Southeast Gulf of California, Mexico Ernesto Álvarez-Dagnino Apolinar Santamaría-Miranda Manuel García-Ulloa Andrés M. Góngora-Gómez Biología agement capture man conservation Gonadic index spawning season Bivalves reproductive cycle varies according to the particular environmental conditions where they are found, and these reproductive details represent basic information for their capture, management and conservation strategies. With this objective, the reproductive cycle of the clam Megapitaria squalida, inhabiting the Southeast of the Gulf of California (Altata Bay, Sinaloa, Mexico), was studied using histology and changes in the number and size of oocytes, from June 2013 to June 2014. Histological analysis of the gonads showed spawning activity throughout the year, with two peaks. The first was registered in October and it was accompanied by the highest decrease of weight; the second was in February with the highest percentage of spawning population; besides, a resting period was observed in December. The sex-ratio (female:male) of the clam population was 1.08:1 (χ2 = 5.72, d.f. = 1, P < 0.05). Mean oocyte size and number were different (P < 0.05) among all sampling months and fluctuated from 34.6 ± 5.8 µm in June 2014, to 41.9 ± 6.8 µm in February 2014, and from 443.8 ± 424.5 in February 2014, to 1 214.4 ± 267.6 counted in April, respectively. With these results we suggest a protection season from October to November, when the most intense release of gametes occur in this population. Rev. Biol. Trop. 65 (3): 881-889. Epub 2017 September 01. 2017 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44954192004 https://www.redalyc.org/journal/449/44954192004/ https://www.redalyc.org/journal/449/44954192004/html/ https://www.redalyc.org/journal/449/44954192004/44954192004.epub https://www.redalyc.org/journal/449/44954192004/movil 10.15517/rbt.v65i3.26371 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.65