The spatial arrangement of <i>Neritina virginea</i> (Gastropoda: Neritidae) during upstream migration in a split‐channel reach

Blanco, Juan F.; Scatena, Frederick N.

doi:10.1002/rra.974

Cited by 15 publications

(28 citation statements)

References 23 publications

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“…Thus, amphidromy may be a still more common life history strategy than is presently known. It is also recognised in a significant number of atyid shrimps (Crustacea: Carpenter 1982;Fievet and Eppe 2002;Page et al 2006) and neritid gastropods (Mollusca: Ford and Kinzie 1982;Blanco and Scatena 2007), something of which Myers (1949) was unaware.…”

Section: Introductionmentioning

confidence: 98%

Early hatch: a strategy for safe downstream larval transport in amphidromous gobies

McDowall

2008

Rev Fish Biol Fisheries

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The downstream migration to sea of newlyhatched larvae of amphidromous fishes exposes them to the risk of irreversible starvation if migration takes too long. Some fishes, especially sicydiine gobies, exhibit early hatch of eggs, often less than 48 h after fertilisation, and the newly-hatched larvae are at a very early stage of ontogeny, with no functional mouth or fins, no functional eye, and little pigmentation in the eye or elsewhere. This may facilitate survival as it means that downstream migration takes place when plenty of yolk remains, minimising the risk of starvation. Additional behaviours, such as positive phototaxis, continual swimming up into the water column, and hatching during elevated river flows, may also have contributed to rapid downstream transport and survival.

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Section: Introductionmentioning

confidence: 98%

Early hatch: a strategy for safe downstream larval transport in amphidromous gobies

McDowall

2008

Rev Fish Biol Fisheries

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“…Dispersal, and often migration, is an essential component of the life history and ecological niche of many organisms (Dingle & Drake, 2007). Migration has been documented for gastropod snails in tropical (Paulini, 1963; Ford & Kinzie, 1982; Schneider & Frost, 1986; Wallace, 1992; Pyron & Covich, 2003; Blanco & Scatena, 2005, 2006, 2007), temperate (Bovbjerg, 1952; Ball, Wojtalik & Hooper, 1963; Houp, 1970; Mancini, 1978; Burris, Bamford & Stewart, 1990) and intertidal habitats (Garrity & Levings, 1981; Crowe, 1996). Migration from the ocean into fresh water occurs in two subclasses, three orders and 10 gastropod families (Hutchinson, 1967; Graham, 1985; Huryn & Denny, 1997).…”

Section: Introductionmentioning

confidence: 99%

Dispersal and upstream migration of an amphidromous neritid snail: implications for restoring migratory pathways in tropical streams

et al. 2012

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Summary 1. The amphidromous life cycle of several species of neritid snails, shrimp and gobies throughout the tropics includes juveniles that migrate from the ocean to breed in fresh water. In many Hawaiian streams, the decline of Neritina granosa, an endemic gastropod, has been associated with habitat degradation and water withdrawal, which are common factors affecting tropical rivers around the world. 2. We investigated the effects of water withdrawal and density on dispersal and upstream migration of N. granosa using three experimental treatments: (i) reduced flow (RF) owing to a stream diversion, (ii) natural flow (NF) and (iii) natural flow with artificially increased snail density. For each treatment, snails were differentially tagged and released in a stream without a natural, extant population of N. granosa. 3. Capture rates ranged from 17 to 65% over a 63‐day period following release. Captures on 2–6 days after release measured initial dispersal and migration, whereas longer‐term migration rates were calculated from snails captured 16–63 days after release. Snails under NF displayed positive rheotactic behaviour, with only 3–12% demonstrating initial downstream movement. Under RF, 22–77% of snails moved downstream or showed no bias either way. 4. Initial mean upstream migration rate (UMR) was 0.25, 0.66 and 1.16 m day−1 under RF, NF and natural flow with increased snail density, respectively. Longer‐term migration rates did not differ significantly between treatments, and the overall mean was 0.62 m day−1. 5. Principal component analysis and generalised linear models were used to identify habitat characteristics important to UMR, with habitat and reach‐scale hydraulics as the most important factors. The relationship between discharge and UMR suggested it would take 11–35 years for snails to migrate past the most upstream water diversion. However, rates from published studies of neritid snail species migrating en masse or in long lines under natural situations suggested that N. granosa could migrate above stream diversions within 72 days–2.5 years (when in an aggregation) and 29 days–1.1 years (when following in long lines of individuals). 6. An understanding of upstream neritid snail migration can be used for the management and conservation of this and other migratory species in tropical streams.

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“…The island of Puerto Rico provides an excellent location to study the interactions between humans and the environment among intersecting river and road networks. Nearly all of the non‐insect, stream fauna have a diadromous life cycle and migrate through a dense river network over steep terrain (Blanco & Scatena, 2006, 2007; Kikkert, Crowl & Covich, 2009). At 438 people per km 2 , Puerto Rico also has one of the highest population densities on the planet (U.S.…”

Section: Introductionmentioning

confidence: 99%

“…Species naturally confined to highly disturbed streams at low altitudes may suffer reduced abundances (McDowall, 2007). Species that spend the majority of their life cycle in headwater streams may also be impacted if anthropogenic barriers impede or severely reduce migration (Benstead et al, 1999;Blanco & Scatena, 2007). Despite the large body of work documenting effects of roads on streams (Trombulak & Frissell, 2000), few studies have been conducted in the tropics (but see MacDonald et al, 2001;Blanco & Scatena, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of coupled natural and anthropogenic factors on the community structure of diadromous fish and shrimp species in tropical island streams

et al. 2010

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1. Overlapping river and road networks provide a framework for studying the complex interactions between natural and human systems, with river-road intersections as focal areas of study. Roads can alter the morphology of stream channels, pose barriers to freshwater fauna, provide easy access to streams for humans and non-native species and accelerate the expansion of urban development. 2. We determined what variables control the structure of diadromous fish and shrimp communities and assessed whether particular road crossings altered community structure in north-eastern Puerto Rico. We identified 24 sites that represented a range of river and road sizes across two catchments that drain El Yunque National Forest in Puerto Rico. 3. The location of natural barriers and the size of stream pools were the most important variables for predicting six of fifteen fish and shrimp distributions. Predatory fishes were predicted to be limited to areas in the river network below large, steep waterfalls, whereas adult shrimp Atya lanipes (Atyidae) were predicted to be present above these waterfalls. The fish Awaous banana was predicted to be present in pools >11.6 m wide, whereas the shrimp Xiphocaris elongata was predicted to be present in pools <10.4 m wide. The distributions of nine species were predicted poorly, but three of these species were common and three were rare. 4. Although urban and agricultural land covers were among the top three predictors of five species distributions, they were probably good predictors because they were correlated with the natural gradient. Further study is necessary to disentangle natural and anthropogenic gradients. 5. Road crossings, 10 of which were culverts, were not dispersal barriers for fishes or shrimps. On average, species were present both upstream and downstream from road crossings at 68% of sites where they occurred. Absences upstream or downstream from road crossings occurred at 16% of sites each and likely resulted from a failure to detect species.

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The spatial arrangement of Neritina virginea (Gastropoda: Neritidae) during upstream migration in a split‐channel reach

Cited by 15 publications

References 23 publications

Early hatch: a strategy for safe downstream larval transport in amphidromous gobies

Early hatch: a strategy for safe downstream larval transport in amphidromous gobies

Dispersal and upstream migration of an amphidromous neritid snail: implications for restoring migratory pathways in tropical streams

Effects of coupled natural and anthropogenic factors on the community structure of diadromous fish and shrimp species in tropical island streams

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