Search results
Results from the WOW.Com Content Network
Thalassoma bifasciatum forages for zooplankton, mollusks, small crustaceans (such as shrimp and krill), worms, other motile invertebrates, and the eggs of smaller fish, [4] as well as ectoparasites [4] on other fish. Initial phase males eat primarily zooplankton from currents, and females and initial phase males have certain hunting times ...
Parachromis managuensis is a large species of cichlid native to freshwater habitats in Central America, where it is found from Honduras to Costa Rica. [2] The binomial name refers to Lake Managua in Nicaragua, from which the holotype was obtained. [3]
The sex change is most likely due to the control of hormones, in particular, 11-ketetestosterone (11-KT). [5] The timing of the sex change can vary depending on population density, growth, and mortality rates. Early sex changes may occur if sexually active individuals have a higher mortality rate or have reduced growth rates. [6]
The common pandora is a protogynous hermaphroditism in which the females change sex to become males when they reach lengths between 12.8 and 20.3 cm (5.0 and 8.0 in). [10] This sex change typically when they are 3–4 years old, [7] however, this is not always true as small males and even large females are often recorded. The spawning season ...
The Cuban gar (Atractosteus tristoechus), also known as the manjuarí, is a fish in the family Lepisosteidae. [4] It is a tropical, freshwater species, although it also inhabits brackish water. [5] It is found in rivers and lakes of western Cuba and the Isla de la Juventud. [5] The flesh of the fish is edible, but the eggs are poisonous for ...
Gonochorism is thought to be ancestral in hermaphroditic fishes because it is widespread in basal clades of fish and other vertebrate lineages. [ 14 ] Two papers from 2008 have suggested that transitions between hermaphroditism and gonochorism or vice versa have occurred in animals between 10 and 20 times. [ 15 ]
Bivalvia are often gonochoric, meaning they have two distinct sexes, but some are protandric hermaphrodites meaning they can change genders throughout their growth. [5] The life stage of Anomia ephippium begins at the embryonic stage post fertilization. The embryos then develop into trochophore larvae, which are described to be free-swimming.
Yearlings of A. gueldenstaedtii (a) and P. spathula (d), and their hybrids: (b) typical LH (larger genome) hybrid, (c) typical SH (smaller genome) hybrid. [1]The sturddlefish is a hybrid of the American paddlefish (Polyodon spathula) and the Russian sturgeon (Acipenser gueldenstaedtii), accidentally created by researchers in 2019 and announced in 2020. [2]