Population structure and reproductive behavior of Sinaloa cichlid Cichlasoma beani (Jordan, 1889) in a tropical reservoir

Abstract

The population structure and reproductive condition of the Sinaloa cichlid Cichlasoma beani from samples obtained from June 2000 to July 2001 were determined. Samples in the first week each month from the largest trader of tilapia in the Aguamilpa Reservoir in Mexico and were caught in gillnets (9.6 and 11.4 cm stretch-mesh size). Of 596 specimens, there were 427 males and 169 females; monthly sex ratio, frequency of lengths by the multinomial distribution, timing of reproduction, condition index, and size at first maturity was determined. Differences in the sex ratio and monthly totals were significant, favoring males, except for September 2000 and March 2001. From one (August 2000) to three modal groups (July 2000 and June 2001) were identified by size. There were no significant differences in standard length weight relationships by sex, which indicated that a shared model for both genders is appropriate, and isometric growth was detected. Based on the proportion of mature and partially matures fish, the main reproductive period was April through June; size at first maturity was 18.9 cm. Water temperature was not significantly related to the percentage of mature and partially matures Sinaloa cichlids or spawning. These findings provide information for regulating the Cichlasoma beani fishery in this region such minimum legal size and non-fishing period.

Effect of Stocking Density on Growth, Survival, and Condition of the Mexican Cichlid Cichlasoma beani

“…However, future studies are needed to verify this strategy in the species. The occurrence of reproduction in individuals cultured in the preliminary trial (weight 21 and 23 g and length 7.5 and 9.5 for female and male, respectively) differs from García‐Lizárraga et al (), who reported minimal reproductive size in the species as 10.5 cm (standard length). However, the findings of García‐Lizárraga et al () were obtained from in situ data.…”

Partial Characterization of Digestive Proteases in the Green Cichlid, Cichlasoma beani

“…In this context, a study by [3] focused on the in situ reproductive population structure and its relation to the ecology of this species. Prior studies examined the effects of stocking density on growth and survival of this species under culture conditions [4,5].…”

Preliminary observations on Cichlasoma beani in culture conditions

“…During the present study, C. beani was found in shallow waters of the San Pedro fluvial system at temperatures as high as 32°C. Apart (quotes) for San Pedro from an ecological study (García-Lizárraga et al, 2011) and a few parasite related studies (Caspeta-Mandujano et al, 1999, 2001Camacho et al, 2002;De Leon et al, 2008), there is no existing scientific information on the biology of C. beani. The development of culturing techniques has been a successful strategy to protect species.…”