The interrenal gland in males of the cichlid fish Cichlasoma dimerus: Relationship with stress and the establishment of social hierarchies

Histological Organization of Thyroid and Interrenal Glands of the Pearl Mullet, Alburnus tarichi (Cypriniformes: Cyprinidae) from Lake Van Basin of Turkey

“…The nuclei of the interrenal cells were usually round and basophilic. The histochemical observations were similar to those of other fish species, where the eosinophilic coloration of the cytoplasm of interrenal cells was also reported in matrinxã (Bryon cephalus) (Rocha et al 2001), pacu (Piaractus mesopotamicus) (Gazola et al 1995), flounder (Durkina 2006) and cichlid fish (Cichlasoma dimerus) (Morandini et al 2014). The chromaffin cells were larger than the interrenal cells, when stained with H&E they exhibited a pale cytoplasm and had a large slightly basophilic nucleus with a prominent nucleolus.…”

“…In some instances, the chromaffin cell groups were observed to be associated with a ganglion cell in pearl mullet. Genten et al (2008) and Morandini et al (2014) also observed a ganglion cell in the chromaffin tissue of Scyliorhinus canicula and cichlid fish (Cichlasoma dimerus) species, respectively. Histochemically, both the interrenal and chromaffin cells of pearl mullet displayed a negative reaction to PAS staining.…”

“…In stickleback (Gasterosteus aculeatus), the gland tissue is composed of cords and nests of interrenal and chromaffin cells surrounding the post cardinal veins and their branches (Civinini et al 2001). In cichlid fish (Cichlasoma dimerus), interrenal cells are found in contact with smaller veins and sinusoids of the postcardinal vein and arranged in groups or cords, separated from each other and from the parenchyma of hematopoietic cells by a thin layer of connective tissue, while the chromaffin cells are situated in groups just below the main veins (Morandini et al 2014). Thus, it can be said that the distribution of the interrenal and chromaffin cells in pearl mullet displays similarities to other fish species with some differences.…”

A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish

“…ACCEPTED MANUSCRIPT 4 al., 1986;Duckworth et al, 2004;Oliveira et al, 2002;Renn et al, 2012;Taves et al, 2009), whereas subordinates perform submissive behaviors, often accompanied by elevated glucocorticoid concentrations (Alonso et al, 2011;Greenberg et al, 1984;Morandini et al, 2014;Sherman et al, 2012). Even though estrogens have been historically associated with female-typical behavior, evidence has been accumulating on its active role in the regulation of male aggressive behavior (Huffman et al, 2013;Soma et al, 2000b;Schlinger and Callard, 1990).…”

“…Increased cortisol secretion is a primary indicator of stress in teleost fish (Pankhurst , 2011), as in many other vertebrates species (Baker et al, 2013), including C. dimerus (Alonso et al, 2011;Morandini et al, 2014). However, stress can be experienced by both top-and bottom-ranked animals, and is dependent on social organization, composition and individual variability (Creel, 2001;Sapolsky, 2005).…”