TY - JOUR
T1 - Reproductive readiness of the shrimp Litopenaeus vannamei grown in a brackish water system
AU - Parnes, S.
AU - Mills, E.
AU - Segall, C.
AU - Raviv, S.
AU - Davis, C.
AU - Sagi, A.
N1 - Funding Information:
We would like to thank Ms. Inez Mureinik for styling the manuscript. We also would like to thank Mr. Menachem Borenshtein and Mr. Eviatar Snir, Matan Negev Shrimp, and Mr. Amit Ziv and Mr. Ramy Alon, Desert Shrimp, for their collaboration in parts of the study. The assistance of Mr. Dudu Azulay with the animal husbandry is highly appreciated. This study was supported by grants from the Israel Ministry of Commerce and Trade and B.G. Technologies.
PY - 2004/6/14
Y1 - 2004/6/14
N2 - The reproductive readiness of the marine shrimp Litopenaeus vannamei (formerly Penaeus vannamei) cultured in brackish water was characterized by applying morphological, physiological, and molecular tools. The shrimp were cultured on two commercial shrimp farms in brackish water that was pumped from artesian wells that tap into a geothermal aquifer. The shrimp populations exhibited a bimodal growth curve with the females being significantly bigger than the males at the end of the growout period. Some male shrimp started to develop spermatophores about 6 months after the first post-larval (PL 0) stage, and some with developed, normal-looking, white spermatophores were observed 8 months after PL0. The sperm count in these males was 10.1×106±5.8×106 cells per compound spermatophore, and 81.6±19.8% of the cells were spiked. Melanization of the males, which eventually affected about a third of the male population, first became evident before the appearance of white spermatophores. Female ovaries were transparent and appeared to be arrested in a previtellogenic stage. However, beyond a weight/age threshold of 20 g/8 months, some of the ovaries had become opaque and the vitellogenin gene was found to be expressed in the ovary - but not in the hepatopancreas - of 7 out of 10 females. A unique case of a 46.8 g female with a fully developed ovary that was found in the brackish-water-held broodstock is reported.
AB - The reproductive readiness of the marine shrimp Litopenaeus vannamei (formerly Penaeus vannamei) cultured in brackish water was characterized by applying morphological, physiological, and molecular tools. The shrimp were cultured on two commercial shrimp farms in brackish water that was pumped from artesian wells that tap into a geothermal aquifer. The shrimp populations exhibited a bimodal growth curve with the females being significantly bigger than the males at the end of the growout period. Some male shrimp started to develop spermatophores about 6 months after the first post-larval (PL 0) stage, and some with developed, normal-looking, white spermatophores were observed 8 months after PL0. The sperm count in these males was 10.1×106±5.8×106 cells per compound spermatophore, and 81.6±19.8% of the cells were spiked. Melanization of the males, which eventually affected about a third of the male population, first became evident before the appearance of white spermatophores. Female ovaries were transparent and appeared to be arrested in a previtellogenic stage. However, beyond a weight/age threshold of 20 g/8 months, some of the ovaries had become opaque and the vitellogenin gene was found to be expressed in the ovary - but not in the hepatopancreas - of 7 out of 10 females. A unique case of a 46.8 g female with a fully developed ovary that was found in the brackish-water-held broodstock is reported.
KW - Bimodal growth
KW - Crustacea
KW - Decapoda
KW - Geothermal brackish water
KW - Litopenaeus vannamei
KW - Melanization
KW - Pacific white shrimp
KW - Penaeidae
KW - Reproduction
KW - Spermatophores
KW - Vitellogenin
UR - http://www.scopus.com/inward/record.url?scp=2442610661&partnerID=8YFLogxK
U2 - 10.1016/j.aquaculture.2004.01.040
DO - 10.1016/j.aquaculture.2004.01.040
M3 - Article
AN - SCOPUS:2442610661
SN - 0044-8486
VL - 236
SP - 593
EP - 606
JO - Aquaculture
JF - Aquaculture
IS - 1-4
ER -
