Tissue biochemical composition in relation to multiple spawning in wild and pond-reared Penaeus vannamei broodstock

Palacios, Elena; Ibarra, Ana M.; Racotta, Ilie S.

doi:10.1016/s0044-8486(99)00362-2

Cited by 118 publications

(83 citation statements)

References 31 publications

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“…The gradual increment of gonadosomatic index while approaching to mating season was also recorded in other decapod species (PALACIOS et al, 2000;ZAPATA et al, 2003;CARMONA-OSALDE et al, 2004). The gonadosomatic indices of males fluctuated within a very small range during reproductive period (0.2-1.5% GSI), similarly to the findings of YAMAGUCHI (2001) with Uca lactea.…”

Section: Discussionsupporting

confidence: 76%

Morphological Changes in Astacus Astacus Gonads During the Reproductive Cycle

Lučić¹,

Erben²,

Lacković³

2006

Bull. Fr. Pêche Piscic.

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The reproductive cycle of Astacus astacus was described by the external observation of the gonads, recording changes in the gonadosomatic index (GSI) and by the histological analysis of the reproductive organs. A total of 37 males and 13 females of Astacus astacus were collected from the Vukovina gravel pit located at northwest Croatia from May 2003 until January 2004. All crayfish were mature with total body lengths between 7.84 and 13.7 cm and weights between 16 and 125 g. There was a pronounced difference between the GSI values of the sexes. GSI fluctuated within a very small range (between 0.2 and 1.5%) in males while in females it increased up to 12.3% during the mating season. The external appearance of the testes and ovaries during the reproductive cycle was compared with the histological sections of germ cells in the testes, the vas deferens and ovaries. Besides the germinative cells, the morphological changes in testis and vasa deferentia of A. astacus extended also to the connective tissue and secretory epithelium. The maturation of germinative cells was synchronized, both in testes and ovaries. Key-words:Astacus astacus, reproductive cycle, gonadosomatic index, gonads, histology. LES CHANGEMENTS MORPHOLOGIQUES DES GONADES D'ASTACUS ASTACUS PENDANT LE CYCLE REPRODUCTIF RÉSUMÉLe cycle reproductif d'Astacus astacus a été décrit par l'observation externe des gonades, en enregistrant les changements de l'indexe gonadosomatique (GSI), et par l'analyse histologique des organes reproductifs. De mai 2003 à janvier 2004, 37 mâles et 13 femelles d'Astacus astacus ont prélevées dans une mine de gravier près de Vukovina qui se trouve au Nord Ouest de la Croatie. Toutes les écrevisses récoltées étaient mûres, mesuraient de 7,84 à 13,7 cm de longueur totale et pesaient de 16 à 125 g. Il y a une différence accentuée entre les valeurs de GSI des deux sexes. Chez les mâles les valeurs de GSI ont oscillé sur une toute petite amplitude (entre 0,2 et 1,5%) tandis que chez les femelles il a atteint 12,3% pendant la période reproductive. L'apparence externe des testicules et des ovaires pendant le cycle reproductif a été comparée aux coupes histologiques des cellules germinatives dans les testicules, les canaux déférents et les ovaires. Des changements morphologiques sont observés sur les testicules, les canaux déférents et les ovaires et s'étendent au tissu connectif et à l'épithélium sécréteur. La maturation des cellules germinatives est synchronisée dans les testicules aussi bien que dans les ovaires.

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Section: Discussionsupporting

confidence: 76%

Morphological Changes in Astacus Astacus Gonads During the Reproductive Cycle

Lučić¹,

Erben²,

Lacković³

2006

Bull. Fr. Pêche Piscic.

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“…Several papers about biochemistry variations during reproduction have demonstrated that other tissues and organs, besides the hepatopancreas and ovary, can accumulate organic reserves, such as the hemolymph and the muscles (PILLAY & NAIR 1973, SPAARGAREN & HAEFNER 1994, PALACIOS et al 2000, CAVALLI et al 2001, ROSA & NUNES 2002.…”

Section: 1mentioning

confidence: 99%

Dynamics of gonadal development of Aegla platensis Schmitt (Decapoda, Anomura, Aeglidae)

2006

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One way to estimate gonadal development through the reproductive cycle is to observe the growth of the gonads related to the organs used to store energy. The aim of this study was to follow the gonadosomatic and hepatosomatic indexes during annual cycle of Aegla platensis Schmitt, 1942. Adult animals were collected in Taquara, Rio Grande do Sul, Brazil (29°46'S, 50°53'W). Males and females were initially weighed and dissected and had their gonads and hepatopancreas (HP) removed and weighed in order to estimate the Gonadosomatic (GI) and hepatosomatic (HI) indexes. In females, the indexes were also compared to the degree of development of the ovaries. In males the GI showed a peak of gonadal development in the autumn (p < 0.05), just when the HI showed a decrease (p < 0.05). Females showed a rise in the GI at the end of summer and beginning of autumn (p < 0.05). In females, GI values increased as the ovary matured. In A. platensis, for both males and females, the HI never showed values lower than the GI, which may indicate that these aeglids show a different pattern of energy utilization from other decapods, where as gonadal development peaks the HI decreases markedly.

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“…These findings indicated that the relative hepatopancreas weight decreased with the increase of relative ovaries weight while energy accumulated in both organs although the energy accumulation is more intensive in ovaries (decrease of GM from 82.7 to 72%). Many other authors also found an increase in the relative gonad weight with approaching to mating period (PALACIOS, IBARRA and RACOTTA, 2000;ZAPATA et al, 2003;CARMONA-OSALDE et al, 2004).…”

Section: Discussionmentioning

confidence: 83%

Seasonal Changes of the Condition Indices and Haemocyte Counts of the Austropotamobius Torrentium Population in Kraljevec Stream, Croatia

Lučić¹,

Erben²

2005

Bull. Fr. Pêche Piscic.

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The stone crayfish, Austropotamobius torrentium (Schrank, 1803) is one of the four native European crayfish living in Croatian freshwaters. Kraljevec Stream is situated on the southern slopes of Medvednica Mountain (north-west Croatia) at 400 m above sea level. Our research was carried out for one year, from May 2003 to April 2004. During the study period water temperature varied between 2 to 17.2°C, alkalinity between 100 and 200 mg CaCO 3 /L, the mean oxygen concentration and pH was 12.1 mg/L and 8.3, respectively. Crayfish were trapped by baited hand made traps, which were secured in a stream current with the stones and roots of the surrounding trees. We caught 100 crayfishes, 68 males and 32 females. Hemolymph was sampled 10 to 15 min after the catch. EDTA anticoagulant was used to prevent hemolymph coagulation and 10% formalin was used to fix haemocyte for differential counts. Each month five or six specimens of each sex, if possible, were sacrificed and hepatosomatic, gonadosomatic and muscle indices were measured. We found statistically significant differences in hepatosomatic and gonadosomatic indices between months and between sexes. Muscle indices were significantly different between males and females. The average total haemocyte counts were 7.6 × 10 5 cells/ ml and 6.5 × 10 5 cells/ml hemolymph for males and females, respectively. The average hyalinocyte, granulocyte and semigranulocyte ratio was 77: 14.5: 8.5%. There were no statistically significant differences in total haemocyte counts between months and between sexes.

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Tissue biochemical composition in relation to multiple spawning in wild and pond-reared Penaeus vannamei broodstock

Cited by 118 publications

References 31 publications

Morphological Changes in Astacus Astacus Gonads During the Reproductive Cycle

Morphological Changes in Astacus Astacus Gonads During the Reproductive Cycle

Dynamics of gonadal development of Aegla platensis Schmitt (Decapoda, Anomura, Aeglidae)

Seasonal Changes of the Condition Indices and Haemocyte Counts of the Austropotamobius Torrentium Population in Kraljevec Stream, Croatia

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