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Lockyear, Jacqueline F.; Kaiser, Horst; Hecht, T.

doi:10.1023/a:1018395803722

Cited by 41 publications

(1 citation statement)

References 11 publications

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“…In operations meant for breeding, pairs should be isolated from others (as seen [32,35]), either in separate tanks or by using mesh to separate pairs to reduce interactions with other fish. This will reduce the stress associated with aggressive behaviors as well as decrease the rate of dropped or partial clutch transfer because of competing males.…”

Section: Discussionmentioning

confidence: 99%

When more is not merrier: Using wild population dynamics to understand the effect of density on ex situ seahorse mating behaviors

Masonjones

Rose

2019

PLoS ONE

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Seahorses are considered one of the most iconic examples of a monogamous species in the animal kingdom. This study investigates the relationship between stocking density and mating and competitive behavior from the context of the field biology of the dwarf seahorse, Hippocampus zosterae (Jordan & Gilbert). Animals were housed in 38 liter tanks at a range of densities and sex ratios (from 2–8 animals per tank), and their reproductive and other social behaviors were monitored from tank introduction through copulation. At low tank densities and even sex ratios but comparatively high field densities, frequency of both mating and competitive behaviors was low in trials. A higher level of males in tanks across all densities increased competition, activity levels, and aggression leading to egg transfer errors and brood expulsion, resulting in lower reproductive success. Across seahorse species, mean and maximum wild densities were consistently lower than those used in ex situ breeding, with adult sex ratios that were significantly female biased. However, significant variation exists in wild seahorse densities across species, with higher densities detected in focal/mark recapture studies and on artificial habitat structures than reported with belt transect sampling techniques. Interchange of knowledge gained in both aquarium and wild contexts will allow us to better understand the biology of this genus, and improve reproduction in captivity. Interpreting ex situ reproductive behaviors of seahorses within various densities reported from natural populations will help us predict the impact of conservation efforts and increase the likelihood of long-term persistence of populations for this threatened genus.

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Section: Discussionmentioning

confidence: 99%

When more is not merrier: Using wild population dynamics to understand the effect of density on ex situ seahorse mating behaviors

Masonjones

Rose

2019

PLoS ONE

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Factors Affecting Successful Culture of the Seahorse, Hippocampus Abdominalis Leeson, 1827

Woods¹

2003

Marine Ornamental Species

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Growth of cultured seahorses (Hippocampus abdominalis) in relation to feed ration

Woods

2005

Aquacult Int

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This investigation examined the effect of varying feed ratios on cultured seahorse (Hippocampus abdominalis) growth and survival using frozen mysids (Amblyops kempii) at daily feed rations of 5, 10, 15 or 20% wet body weight. Feeding these different feed rations did not result in any significant difference in seahorse standard length after 3 months. However, seahorses fed the 10-20% rations were heavier and with higher condition factor (CF). Based on the total amount of frozen mysids offered to the seahorses, the food conversion ratio (FCR) became less efficient with increasing feed ration. However, when the actual mysid consumption was factored in there were no significant differences in FCR. There was a significant difference in daily specific growth rate (SGR), with the 5% ration having the lowest SGR. On a cost/benefit basis, based on the total amount of mysids offered the most cost effective ration for daily length and weight increase was the 5% ration. With actual mysid consumption taken into account, cost/benefit value favoured the 5 and 10% feed rations. Survival was 100% across all treatments. Based on this, a feed ration of 5-10% wet body weight per day of frozen mysids is recommended for cultured H. abdominalis.

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Cited by 41 publications

References 11 publications

When more is not merrier: Using wild population dynamics to understand the effect of density on ex situ seahorse mating behaviors

When more is not merrier: Using wild population dynamics to understand the effect of density on ex situ seahorse mating behaviors

Factors Affecting Successful Culture of the Seahorse, Hippocampus Abdominalis Leeson, 1827

Growth of cultured seahorses (Hippocampus abdominalis) in relation to feed ration

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