Life History and the Costs of Reproduction in Northern Great Plains Paddlefish (<b><i>Polyodon spathula</i></b>) as a Potential Framework for Other Acipenseriform Fishes

Scarnecchia, Dennis L.; Ryckman, L. Fred; Lim, Youngtaik; Power, Greg J.; Schmitz, Brad J.; Firehammer, Jon A.

doi:10.1080/10641260701486981

Cited by 42 publications

(133 citation statements)

References 77 publications

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“…Juveniles and adults of S. gouldingi presented similar diet composition, rejecting the previous hypothesis that physiological and morphological differences resulting from life stages, could affect the feeding ecology of fishes (Scarnecchia et al 2007;Ballesteros et al 2009). Although ontogenetic variations have been evidenced in the diet of Serrasalmus species (Machado-Allison and Garcia 1986; Almeida et al 1998), they have been closely related to the morphological limitations found in smaller individuals, preventing them to use the same resources consumed by adults (Machado-Allison and Garcia 1986).…”

Section: Discussioncontrasting

confidence: 48%

“…In different life stages, some reproductive aspects cause physiological limitation, once adult individuals require powerful energetic resources for sexual maturation (Scarnecchia et al 2007;Ballesteros et al 2009). Morphological differences in adults and juveniles may also affect diet, due to development degree of dentition and swimming ability of individuals.…”

Section: Introductionmentioning

confidence: 99%

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Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

et al. 2016

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Studies on feeding ecology of fishes are important to understand the relationship between species and environmental seasonal variations. In tropical rivers, these relationships are mainly modeled by hydrological patterns. Thereby, this study aimed to assess the influence of fluviometric variation and life stage (juveniles and adults) in the feeding ecology of Serrasalmus gouldingi in the lower Anapu River region, located in Eastern Amazon, Pará, Brazil. Specimens were collected bimonthly, considering four different hydrological periods. We assessed the diet composition, feeding intensity and niche breadth of the species. Thirty-two dietary items were identified and grouped into ten categories. A total of 279 stomachs were analyzed, showing a predominance of fish fragments, followed by fruits and seeds. The diet composition of S. gouldingi differed only between drought and flood season, although it did not differ between juveniles and adults. An increase in feeding intensity was recorded during the rise in the water level, with a lower feeding intensity observed during transitional season. Serrasalmus gouldingi showed lower niche breadth during flood season, attributed to the high consumption of fruits and seeds, presenting an omnivorous diet with high tendency towards piscivory. Although less evident than in other Amazon watersheds, the flood pulse in the lower Anapu River region is an important factor influencing the feeding ecology of the species. KEYWORDS: Amazon basin, diet, flood pulse, niche breadth, repletion index.Ecologia alimentar de Serrasalmus gouldingi (Characiformes: Serrasalmidae) na região do baixo Rio Anapu, Amazônia Oriental, Brasil RESUMO Estudos sobre ecologia trófica dos peixes são importantes ferramentas para compreensão das relações entre as espécies e as variações sazonais no ambiente. Em rios tropicais essas relações são modeladas principalmente por variações hidrológicas. Sendo assim, o objetivo presente estudo é avaliar a influência variação fluviométrica e do estágio de vida (juvenis e adultos) na ecologia alimentar de Serrasalmus gouldingi na região do baixo Rio Anapu, Amazônia Oriental, Pará, Brasil. Os espécimes foram amostrados bimensalmente considerando quatro períodos hidrológicos distintos. Nós avaliamos a composição da dieta, intensidade alimentar e amplitude de nicho da espécie. Foram identificados trinta e dois itens alimentares agrupados em dez categorias. Um total de 279 estômagos foi analisado, registrando um predomínio no consumo de fragmento de peixes seguido por frutos e sementes. A composição na dieta de S. gouldingi diferiu apenas entre os períodos de seca e cheia, não diferindo entre juvenis e adultos. Uma maior intensidade alimentar foi observada durante o aumento do nível dos rios, com uma menor intensidade alimentar durante os períodos transicionais. Durante o período de cheia S. gouldingi também evidenciou uma menor amplitude de nicho, a qual foi atribuída ao elevado consumo de frutos e sementes. Sendo assim, a dieta de S. gouldingi foi classificada como...

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Section: Discussioncontrasting

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

et al. 2016

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“…The strong correlations between reservoir level and GFBs (total weight, in proportion to fish weight, and in proportion to gonad weight; Figures 11-13) support the premise that paddlefish were able to acquire and store more energy during increasing and high reservoir levels than decreasing and low reservoir levels. Scarnecchia et al (2007) demonstrated how GFBs, as indicators of energy acquisition and storage, are accumulated mainly during the immature life history period and depleted (gradually in males; more rapidly, within 2-3 spawns, in females) for maintenance, maturation, and spawning as the fish age. Results from the present article indicate that, in addition reviews in fisheries science vol.…”

Section: Reservoir Levels and Year Class Strengthmentioning

confidence: 98%

“…The life history of the Yellowstone-Sakakawea paddlefish has been comprehensively described by Scarnecchia et al (2007). Newly hatched larvae descend from the Yellowstone River, the primary spawning area, into the turbid headwaters of Lake Sakakawea (Fredericks and Scarnecchia, 1997), where, by July and August, as 150-to 250-mm fork length (tip of rostrum to fork of caudal fin) fish, they are feeding selectively on invertebrates, chiefly the large, predaceous cladoceran Leptodora kindtii (Fredericks, 1994).…”

Section: Yellowstone-sakakawea Paddlefish Stock Characteristicsmentioning

confidence: 99%

Riverine and Reservoir Influences on Year Class Strength and Growth of Upper Great Plains Paddlefish

Scarnecchia

Ryckman

Lim

et al. 2009

Reviews in Fisheries Science

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A long-term investigation (1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006) was conducted on the relation between Yellowstone and Missouri River discharges, water level (elevation) changes of Lake Sakakawea, a Missouri River mainstem reservoir in western North Dakota, and the ecology of the Yellowstone-Sakakawea stock of paddlefish Polyodon spathula, a zooplanktivorous Acipenseriform fish. After impoundment in December 1953, Lake Sakakawea filled gradually over a 13-year period (1953-1966). Water levels were lowered sharply and briefly in 1977 and 1981 and for much more prolonged periods of 1988-1993 and 2000-2006 associated with drought conditions in the central United States and water management decisions by the U.S. Army Corps of Engineers.The 1995 year class of paddlefish, by far the strongest in the 16-year study period, was associated with the sharp rise in water level from August 1993 through 1995, the longest continuous rise since the initial filling and the only period since initial filling when reservoir levels rose substantially in three consecutive years. High reservoir levels were associated with higher densities of zooplankton (all taxa combined and Leptodora kindtii, the primary food of age 0 paddlefish), stronger year classes (based on counts of age 0 fish along standard transects), greater mean weight and condition of age 0 fish in August, greater mean weights of recruits, higher growth rate of adult fish, and greater weight of gonadal fat bodies (GFBs), an indicator of energy storage, in absolute weight, as a percentage of gonad weight, and as a percentage of fish weight. Sixty-three percent of the variation in the ratio of GFB weight/gonad weight was explained by reservoir level. Fish tagged as adult migrants and recaptured in succeeding years after rearing in rising and high reservoir conditions gained an average of 0.04 kg/yr, whereas fish rearing in falling-and low-reservoir conditions lost an average of 0.19 kg/yr. Missouri River discharge during spring was significantly correlated with estimated age 0 year class strength, but a similar relationship did not hold for the Yellowstone River, which is the river used by most spawning paddlefish. Results of this study are consistent with studies from Lake Sakakawea and other reservoirs indicating that trophic upsurge in recently filled (and refilled) reservoirs favors the development of stronger year classes, faster growth, better condition, and larger size at maturity of fishes. Higher riverine discharges, thought to favor paddlefish reproductive success, were also typically associated with a rising or high reservoir. In contrast, low-reservoir levels over the period [2000][2001][2002][2003][2004][2005][2006] have negatively affected paddlefish year class strength, growth, and energy storage. If, in succeeding years, Lake Sakakawea once again is allowed to rise to full pool as it did over the period 1993-1995, inundation of the shorelines and the vegetation can be expected to result in another ups...

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“…Energy allocation to growth and reproduction in organisms with indeterminate growth may suggest dynamic tradeoffs to optimize fitness (Heino and Kaitala, 1999;Skjaeraasen et al, 2012); this life-history strategy also applies to sturgeon and paddlefishes (Scarnecchia et al, 2007). Reduced energy intake in stressful environments such as low flow conditions can slow gonad development (Stead et al, 1999) and delay maturation, potentially leading to skipped spawning and ultimately fewer lifetime spawning events (Rideout and Tomkiewicz, 2011;Secor, 2008).…”

Section: River Hydrology Influences On Spawning Behaviormentioning

confidence: 99%

Spatiotemporal variation in flow-dependent recruitment of long-lived riverine fish: Model development and evaluation

Goto¹,

Hamel²,

Hammen³

et al. 2015

Ecological Modelling

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Life History and the Costs of Reproduction in Northern Great Plains Paddlefish (Polyodon spathula) as a Potential Framework for Other Acipenseriform Fishes

Cited by 42 publications

References 77 publications

Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

Riverine and Reservoir Influences on Year Class Strength and Growth of Upper Great Plains Paddlefish

Spatiotemporal variation in flow-dependent recruitment of long-lived riverine fish: Model development and evaluation

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