Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet

Monosex male culture of C. quadricarinatus is proposed for increasing yields because males reach a larger size at harvest than females. An experiment was done to evaluate the effects of androgenic gland extract and temperature on sex reversal and somatic growth in early juvenile females. Females wer...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: de Bock, M.S., Greco, L.S.L.
Formato: JOUR
Materias:
Androgenic gland
Cherax quadricarinatus
Red claw
Sex reversal
Temperature
crayfish
diet
freshwater ecosystem
growth rate
growth response
high temperature
juvenile
lobster culture
sex reversal
temperature effect
Astacoidea
Parastacidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09676120_v18_n2_p231_deBock
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09676120_v18_n2_p231_deBock
record_format dspace
spelling todo:paper_09676120_v18_n2_p231_deBock2023-10-03T15:55:08Z Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet de Bock, M.S. Greco, L.S.L. Androgenic gland Cherax quadricarinatus Red claw Sex reversal Temperature crayfish diet freshwater ecosystem growth rate growth response high temperature juvenile lobster culture sex reversal temperature effect Astacoidea Cherax quadricarinatus Parastacidae Monosex male culture of C. quadricarinatus is proposed for increasing yields because males reach a larger size at harvest than females. An experiment was done to evaluate the effects of androgenic gland extract and temperature on sex reversal and somatic growth in early juvenile females. Females were exposed to the following experimental conditions: C: control food and temperature maintained at 26 ± 1°C; HT (high temperature): control food and temperature maintained at 28. 5 ± 1°C; VHT (very high temperature): control food and temperature maintained at 31 ± 1°C; AG: food with enriched with androgenic gland (1/10 dose for each juvenile per day) and temperature maintained at (26 ± 1)°C. The juveniles were weighed, sexed, and growth increment (GI) and growth rate (GR) were calculated twice a month. The HT and AG groups differed from the C group in GI and GR indicating a greater somatic growth. At the end of the experiment, the HT and AG groups had similar weight but only the HT group had enhanced oocyte diameter, with some vitellogenic oocytes compared to the C group. In the HT group, there was significant sex reversal, as indicated by development of male and intersex male characteristics in different individuals. Both temperature and AG diet have a high potential for culture of this species because of their enhancement of somatic growth; higher temperature increases the proportion of males, a desirable characteristic of cultured populations. © 2009 Springer Science+Business Media B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09676120_v18_n2_p231_deBock
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Androgenic gland
Cherax quadricarinatus
Red claw
Sex reversal
Temperature
crayfish
diet
freshwater ecosystem
growth rate
growth response
high temperature
juvenile
lobster culture
sex reversal
temperature effect
Astacoidea
Cherax quadricarinatus
Parastacidae
spellingShingle Androgenic gland
Cherax quadricarinatus
Red claw
Sex reversal
Temperature
crayfish
diet
freshwater ecosystem
growth rate
growth response
high temperature
juvenile
lobster culture
sex reversal
temperature effect
Astacoidea
Cherax quadricarinatus
Parastacidae
de Bock, M.S.
Greco, L.S.L.
Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet
topic_facet Androgenic gland
Cherax quadricarinatus
Red claw
Sex reversal
Temperature
crayfish
diet
freshwater ecosystem
growth rate
growth response
high temperature
juvenile
lobster culture
sex reversal
temperature effect
Astacoidea
Cherax quadricarinatus
Parastacidae
description Monosex male culture of C. quadricarinatus is proposed for increasing yields because males reach a larger size at harvest than females. An experiment was done to evaluate the effects of androgenic gland extract and temperature on sex reversal and somatic growth in early juvenile females. Females were exposed to the following experimental conditions: C: control food and temperature maintained at 26 ± 1°C; HT (high temperature): control food and temperature maintained at 28. 5 ± 1°C; VHT (very high temperature): control food and temperature maintained at 31 ± 1°C; AG: food with enriched with androgenic gland (1/10 dose for each juvenile per day) and temperature maintained at (26 ± 1)°C. The juveniles were weighed, sexed, and growth increment (GI) and growth rate (GR) were calculated twice a month. The HT and AG groups differed from the C group in GI and GR indicating a greater somatic growth. At the end of the experiment, the HT and AG groups had similar weight but only the HT group had enhanced oocyte diameter, with some vitellogenic oocytes compared to the C group. In the HT group, there was significant sex reversal, as indicated by development of male and intersex male characteristics in different individuals. Both temperature and AG diet have a high potential for culture of this species because of their enhancement of somatic growth; higher temperature increases the proportion of males, a desirable characteristic of cultured populations. © 2009 Springer Science+Business Media B.V.
format JOUR
author de Bock, M.S.
Greco, L.S.L.
author_facet de Bock, M.S.
Greco, L.S.L.
author_sort de Bock, M.S.
title Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet
title_short Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet
title_full Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet
title_fullStr Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet
title_full_unstemmed Sex reversal and growth performance in juvenile females of the freshwater crayfish Cherax quadricarinatus (Parastacidae): Effect of increasing temperature and androgenic gland extract in the diet
title_sort sex reversal and growth performance in juvenile females of the freshwater crayfish cherax quadricarinatus (parastacidae): effect of increasing temperature and androgenic gland extract in the diet
url http://hdl.handle.net/20.500.12110/paper_09676120_v18_n2_p231_deBock
work_keys_str_mv AT debockms sexreversalandgrowthperformanceinjuvenilefemalesofthefreshwatercrayfishcheraxquadricarinatusparastacidaeeffectofincreasingtemperatureandandrogenicglandextractinthediet
AT grecolsl sexreversalandgrowthperformanceinjuvenilefemalesofthefreshwatercrayfishcheraxquadricarinatusparastacidaeeffectofincreasingtemperatureandandrogenicglandextractinthediet
_version_ 1782025226807148544

Ejemplares similares