Effects of adoption of freshwater residency on life‐history ecology of terapontid grunters

Abstract

1. While fish reproduction has played a critical role in development of life-history theory, the collective effects of a marine-to-freshwater invasion on a clade's reproductive ecology have rarely been explored in a phylogenetic context. We analysed and compared a range of quantitative and qualitative components of reproductive ecology in the Australasian terapontid fishes, a family distributed

Breeding of a Wild Population of South Pacific Bonito Sarda chiliensis chiliensis (Cuvier 1832) Broodstock under Laboratory Conditions in Pisagua, Northern Chile

“…However, in the year 2012, after about 45 days of the last fishing campaign, a couple of fish died in march and ten more between June and October ( Table 2 ). The late mortalities recorded allow inferring that all fish that survived transport did not present late mortality and adapted adequately to the culture conditions [ 12 ]. The causes of the mortalities were unknown, however, one common feature among the dead fish was the compression of the abdominal section.…”

“…Currently, little biological background, for accurate identification of life cycles [ 11 ], and the recognition of embryos and larvae in natural environments [ 12 ], types and amount of feed [ 13 , 14 ], reproduction [ 15 ], larval development [ 16 ], and growth rates [ 17 ] is available specifically for the Sarda chiliensis chiliensis . Scientific aquaculture studies on the species are rare, which is concerning because of the importance that this resource might have for the diversification of Chilean aquaculture.…”

Landscape context and dispersal ability as determinants of population genetic structure in freshwater fishes

“…Hephaestus jenkinsi is widespread throughout the Kimberley, whereas H. epirrhinos is restricted to the Drysdale River and a tributary of the lower King Edward River (Shelley, Morgan, et al., 2018a). They mature late and lay large numbers (hundreds of thousands) of small (1.50–1.65 mm), non‐adhesive demersal eggs during a single wet season spawning event (Davis et al., 2020; Shelley, Morgan, et al., 2018a). Based on these characters, both species are predicted to have high dispersal potential.…”

“…The moderately widespread S. trigonicus is found in the Drysdale, King Edward, and Roe rivers, whereas S. rastellus is restricted to the Drysdale River (Shelley, Morgan, et al., 2018a). They mature moderately early (60–70 mm) and lay moderate numbers (tens of thousands) of medium‐sized (2–3 mm) non‐adhesive demersal eggs during a single wet season spawning event (Davis et al., 2020; Shelley, Morgan, et al., 2018a). Based on these characters, both species are predicted to have moderate dispersal potential.…”

“…For example, the genera Hephaestus, Syncomistes, and Melanotaenia each have a broadly distributed species (H. jenkinsi, S. trigonicus, and M. australis), and short-range endemic species that are effectively restricted to the Drysdale River (H. epirrhinos, S. rastellus, and M. gracilis) (Shelley, Swearer, et al, 2018b;Unmack et al, 2013). These genera differ substantially in dispersal syndromes related to dispersal potential (i.e., life history and swimming ability) (Davis et al, 2020;Shelley, Morgan, et al, 2018a), and these congeneric species exhibit substantial ecological niche differences (Le Feuvre et al, 2021). Although these factors are expected to contribute to species-level differences in dispersal and colonisation ability and, thus, differences in population connectivity, genetic structure, and range extent, this has not been formally tested.…”