Gender identification in farmed giant gourami (Osphronemus goramy): A methodology for better broodstock management

Survey on egg and fry production of giant gourami (Osphronemus goramy): Current rearing practices and recommendations for future research

“…The most subjective criteria were not described here. In a recent study, Slembrouck et al () demonstrated that observations of the hump on the forehead, thickening of the lower jaw, and the pigmentation on the pectoral fin (not for light color phenotypes) were highly reliable for sexing (about 95% success). Nevertheless, to be efficient, observations of the selected criteria should be carried out using objective scales.…”

“…Nevertheless, to be efficient, observations of the selected criteria should be carried out using objective scales. The use of the intraovarian cannulation technique was the most accurate gender identification method but required specific cannulas and skills that make it unfeasible for most small‐scale farms (Slembrouck et al, ). Authors also recommended confirming the gender of selected future brooders after they reached sexual maturity.…”

“…Because of its traditional production practices based on empirical know‐how, there are still gaps in knowledge on several aspects of the biology of this species, particularly for the juvenile life stages (Arifin, Prakoso, Kristanto, Pouil, & Slembrouck, ). One of the main impediments in giant gourami aquaculture is ensuring a regular supply of fry (Slembrouck et al, ). Giant gourami is a species able to reproduce spontaneously in captivity.…”

Methods for identifying and interpreting sex‐linked SNP markers and carrying out sex assignment: application to thornback ray (Raja clavata)

“…The overview of sex-determination systems and statistical methods for identifying putative sex-linked SNPs stresses the logical link between the two; this subject has been reviewed in greater detail by impacts (Trenkel et al, 2019). Sex assignment is also useful in the food industry, for example for determining the sex-related quality category of derived meat products (Abdulmawjood, Krischek, Wicke, & Klein, 2012), broodstock management (Slembrouck et al, 2019) or to allow early culling of undesired individuals to maximize production (Falahatkar, Akhavan, Gilani, & Abbasalizadeh, 2013).…”

“…For example, for determining the sex of tissue samples without access to the individual or of individuals without external sex signs that are caught during scientific monitoring surveys and released alive to reduce monitoring impacts (Trenkel et al, 2019). Sex assignment is also useful in the food industry, for example for determining the sex‐related quality category of derived meat products (Abdulmawjood, Krischek, Wicke, & Klein, 2012), broodstock management (Slembrouck et al, 2019) or to allow early culling of undesired individuals to maximize production (Falahatkar, Akhavan, Gilani, & Abbasalizadeh, 2013). Our study was motivated by a scientific project for which fishers collected a large number of thornback ray tails for later tissue sampling.…”