Seasonal changes in the lymphoid organs of wild brown trout, Salmo trutta L: A morphometrical study

Álvarez, Francisco; Razquin, B.; Villena, A.; Zapata, A.

doi:10.1016/s0165-2427(98)00137-8

Cited by 26 publications

(19 citation statements)

References 13 publications

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“…Moreover, it can also be used as indices of changes in nutritional and energy status (Maxwell and Dutta, 2005). In the present investigation the seasonal differences in Spleen-somatic index for seabass from different regions can be attributed to seasonal variations in temperature and changes in feeding intensity and energy status as has been mentioned by (Alvarez et al, 1998 andMaxwell andDutta, 2005). …”

Section: Spleen-somatic Index (Ssi)supporting

confidence: 53%

Some biological aspects of European seabass Dicentrarchus labrax in Egyptian Mediterranean water and aquaculture, Egypt

Bakhoum

El-Bermawi

Srour

et al. 2015

Mediterranean Aquaculture Journal

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Biological aspects between cultivated and wild sea bass, Dicentrarchus labrax were evaluated. Fish samples were collected seasonally from Boughaz El-Maadiya in the eastern Mediterranean coast and fish farm. The length-weight relationship of seabass from two habitats were calculated and condition factor for seabass captured from El-Maadiya region (Mean ± S.d = 1.044 ± 0.0905) was lower than that for fish farm (Mean ± S.d = 1.158 ± 0.8119). The mean value of natural mortality coefficient for wild seabass was 0.172 ± 0.017. Significant seasonal difference in degrees of stomach fullness of seabass from El-Maadiya region (F = 3.589, df = 3, p<0.05) and fish farm (F = 8.381, df = 3, p<0.01). sex ratio for seabass from El-Maadiya region (X 2 =5.21, p < 0.05) differ significantly from cultivated in fish farm. The average of gonadosomatic index (GSI) (0.258 ± 0.2865), hepatosomatic Index (HSI) (1.20 ± 0.5714) and spleen-somatic index (SSI) (0.102 ± 0.0518) for fishes from El-Maadiya region was lower than GSI (0.940 ± 1.5601), HSI (1.486 ± 0.5247) and SSI (0.157 ± 0.2406) for cultured seabass.

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Section: Spleen-somatic Index (Ssi)supporting

confidence: 53%

Some biological aspects of European seabass Dicentrarchus labrax in Egyptian Mediterranean water and aquaculture, Egypt

Bakhoum

El-Bermawi

Srour

et al. 2015

Mediterranean Aquaculture Journal

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“…Aida 1988) and immune functions (e.g. Álvarez et al 1998, Scapigliati et al 1999, Kortet et al 2003a. Earlier studies emphasized the significance of testosterone on the development of papillomatosis in fishes (Premdas et al 2001, Kortet et al 2003b).…”

Section: Discussionmentioning

confidence: 99%

“…Álvarez et al 1998, Scapigliati et al 1999, Kortet et al 2003a) and parasite load (e.g. Pilcher et al 1989).…”

Section: Abstract: Breeding Tubercles · Spawning Stress · Gender Difmentioning

confidence: 99%

Epizootic cutaneous papillomatosis, cortisol and male ornamentation during and after breeding in the roach Rutilus rutilus

Vainikka¹,

Kortet²,

Taskinen³

2004

Dis. Aquat. Org.

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“…Dietary components are also known to influence spleen size, as rainbow trout fed a vitamin E-deficient diet have enlarged spleens (67). Seasonal and temperature differences may impact spleen weight, as has been observed in brown trout (68). In mammals, it is well known that surgical or traumatic shock may cause the spleen to contract, while deep anesthesia may cause it to relax (69).…”

Section: How Is Spleen Size Linked To Disease Resistance?mentioning

confidence: 99%

Spleen Size Predicts Resistance of Rainbow Trout to Flavobacterium psychrophilum Challenge

Hadidi

Glenney

Welch

et al. 2008

The Journal of Immunology

144

118

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Selective breeding of animals for increased innate resistance offers an attractive strategy to control disease in agriculture. However, this approach is limited by an incomplete knowledge of the heritability, duration, and mechanism(s) of resistance, as well as the impact of selection on the immune response to unrelated pathogens. Herein, as part of a rainbow trout broodstock improvement program, we evaluated factors involved in resistance against a bacterial disease agent, Flavobacterium psychrophilum. In 2005, 71 full-sibling crosses, weighing an average of 2.4 g, were screened, and resistant and susceptible crosses were identified. Naive cohorts were evaluated at 10 and 800 g in size, and most maintained their original relative resistant or susceptible phenotypes, indicating that these traits were stable as size increased >300-fold. During the course of these studies, we observed that the normalized spleen weights of the resistant fish crosses were greater than those of the susceptible fish crosses. To test for direct association, we determined the spleen-somatic index of 103 fish crosses; created high, medium, and low spleen-index groups; and determined survival following challenge with F. psychrophilum or Yersinia ruckeri. Consistent with our previous observations, trout with larger spleen indices were significantly more resistant to F. psychrophilum challenge; however, this result was pathogen-specific, as there was no correlation of spleen size with survival following Y. ruckeri challenge. To our knowledge, this is the first report of a positive association between spleen size and disease resistance in a teleost fish. Further evaluation of spleen index as an indirect measure of disease resistance is warranted.

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Seasonal changes in the lymphoid organs of wild brown trout, Salmo trutta L: A morphometrical study

Cited by 26 publications

References 13 publications

Some biological aspects of European seabass Dicentrarchus labrax in Egyptian Mediterranean water and aquaculture, Egypt

Some biological aspects of European seabass Dicentrarchus labrax in Egyptian Mediterranean water and aquaculture, Egypt

Epizootic cutaneous papillomatosis, cortisol and male ornamentation during and after breeding in the roach Rutilus rutilus

Spleen Size Predicts Resistance of Rainbow Trout to Flavobacterium psychrophilum Challenge

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