Classification and comparison of five estuaries in the southeast Gulf of California based on environmental variables and fish assemblages

Amezcua, Felipe; Ramírez, Miguel Mauricio Correa; Flores-Verdugo, Francisco

doi:10.5343/bms.2018.0018

Cited by 23 publications

(48 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… x = not present in the diet; most significant contributors in bold; SWC = stomachs with content; Juveniles, Preadults, and Young Adults (based on Aguirre‐Villaseñor et al., 2006); DCS = dry‐cold season, DWS = dry‐warm season, and HWS = humid‐warm season (based on Amezcua et al., 2019), Habitat = Prey species habitats (C, Coastal; O, Oceanic; P, Pelagic; B, Benthic; D, Dermersal; N, Neritic; based on Robertson & Allen, 2015) …”

Section: Resultsmentioning

confidence: 99%

“…The relative abundances of anchovies in the S. sierra diet relates to their availability in different regions (Fischer et al., 1995). For example, Anchovia macrolepidota is found inside estuarine systems (Amezcua & Amezcua‐Linares, 2014; Amezcua et al., 2019), and inshore along sandy beaches and in tide streams and forms large schools (Whitehead et al 1988). Mendoza, Castillo‐Rivera, Zarate‐Hernández, and Ortiz‐Burgos (2009) found that A. macrolepidota is highly abundant in the Mexican coast between February and October, the fishing season of S. sierra in our study's region.…”

Section: Discussionmentioning

confidence: 99%

“…To detect intraspecific variation, the sampled organisms were grouped by sex, size classes (FL: <36 cm = juveniles, 36–45 cm = preadults and 45–60 cm = young adults; based on Aguirre‐Villaseñor et al., 2006), and climatic season (dry‐cold season “DCS”, from December 1 to March 31, dry‐warm season “DWS”, from April 1 to June 30, and humid‐warm season “HWS”, from July 1 to November 30; based on Amezcua, Ramírez, & Flores‐Verdugo, 2019). For SCA, we constructed cumulative prey curves (EstimateS program; Colwell, 2006) for each category to determine whether the number of stomachs analyzed was representative of the trophic spectrum of S. sierra (Ferry & Cailliet, 1996).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Trophic niche of the Pacific Sierra (Scomberomorus sierra) in the southeastern Gulf of California: Assessing its importance as a predator and prey (Mesopredator) in the food web

2020

Self Cite

View full text Add to dashboard Cite

The identification of interspecific links (trophic niche) is important to characterize resource use of a predator, and to know its trophic role (for example, mesopredator or top predator) in the food web. In this study, we examined: a) the trophic ecology of Scomberomorus sierra as a predator (niche breadth, trophic overlap, and trophic position) and b) its presence as a prey in the diets of the region´s top predators, to evaluate the critical link of S. sierra as a probable mesopredator in the food web of the southeastern Gulf of California (GC). Based on %PSIRI, the dominant diet of S. sierra were engraulids and cephalopods. The diet was similar between sexes and among size‐classes. However, the isotopic niche breadth values and δ15N variance (>1) reflect a broad niche for young adults likely related to a) changes in morphology (e.g., size of the mouth), b) development of the visual system, and c) changes in the energy requirements of the species reproductive stages. Seasonal changes in prey species’ availability and abundance resulted in isotopic variations, indicating that S. sierra is an opportunistic predator. A wide range in trophic position value (from 3.8 to 4.2) indicated that it also is an intermediary carnivore, with a high degree of trophic plasticity. Although S. sierra has not a dominant role in top predators’ diets, they share some prey species such as anchovies and other fish, depending on predator size. Therefore, S. sierra is a species with many prey‐predator relationships in the southeastern GC food webs that may be considered a critical trophic link. This information is crucial for an ecosystem‐based fisheries management in the Gulf of California.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Trophic niche of the Pacific Sierra (Scomberomorus sierra) in the southeastern Gulf of California: Assessing its importance as a predator and prey (Mesopredator) in the food web

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the richness and diversity were low in both zones and both periods when compared with values observed in nearby systems [Huizache-Caimanero: species richness 61, Shannon diversity 4.0; Teacapan: species richness 51, Shannon diversity 3.8; (Amezcua et al, 2019)]. Previous studies indicate that a lower richness and diversity in similar sites is associated with the physiological limits of the species by salinity and dissolved oxygen (Okada et al, 2003).…”

Section: Fish Assemblages Before and After The Rehabilitationmentioning

confidence: 71%

“…The floodplains analyzed were brackish at the beginning of the year, and in general had good water quality, but as time passed they became hypersaline and hypoxic, until the control zone in both studied periods, and the rehabilitated zone during 2011, dried up by June. In this area the dry season runs from mid-November to mid-June (Amezcua et al, 2019), so all the sampled months occurred during the dry season, and as time passed, the temperature increased, causing evaporation, and therefore a reduction in the depth of the system, an increase in the salinity and temperature of the water, and also a decrease in the dissolved oxygen. These results are likely influencing the changes in the fish assemblages observed throughout the course of this study; regardless of the rehabilitation.…”

Section: Environmental Patterns and Their Effect On Fish Assemblagesmentioning

confidence: 99%

The Effect of Hydrological Connectivity on Fish Assemblages in a Floodplain System From the South-East Gulf of California, Mexico

et al. 2019

Self Cite

View full text Add to dashboard Cite

Are the Temporal Changes Observed in the Reproductive Biology of the Estuarine Conguito Sea Catfish Related to Increased Small‐Scale Fishing Effort on the Northwestern Pacific Coast of Mexico?

et al. 2022

Self Cite

View full text Add to dashboard Cite

Biological parameters relating to the reproductive biology of Conguito Sea Catfish Cathorops liropus were investigated in 1979-1984 and 2015-2018 from an estuarine system on the northwestern Pacific coast of Mexico. In the first period, the spawning season occurred during the dry-warm season (April-June), according with the percentage of mature females and the highest gonadosomatic index (GSI) values. Mean TL was 12.3 cm, two cohorts were found, length at maturity was 18.6 cm, and fecundity was 24.47 oocytes/organism. In the second period, the spawning season extended to the rainy-warm season (July-November), as reflected by the percentage of mature females and the GSI values. Mean TL was 11.6 cm, length at maturity decreased to 17.1 cm, and fecundity decreased to 20.67 oocytes/organism, indicating a reduction in the size-based indicators and a change in the spawning period and reproductive effort as time passed. The number of fishing skiffs increased from 1,103 in 1980 to 2,434 in 2019, representing a 220% increase, and the landings increased from 400 to 3,432 metric tons in the same period. Temporal trends in surface water temperature, salinity, and the Oceanic Niño Index did not explain the observed changes between the study periods. These results suggest that the observed changes in the reproductive potential of Conguito Sea Catfish have been at least partially due to fishing.

show abstract

Classification and comparison of five estuaries in the southeast Gulf of California based on environmental variables and fish assemblages

Cited by 23 publications

References 0 publications

Trophic niche of the Pacific Sierra (Scomberomorus sierra) in the southeastern Gulf of California: Assessing its importance as a predator and prey (Mesopredator) in the food web

Trophic niche of the Pacific Sierra (Scomberomorus sierra) in the southeastern Gulf of California: Assessing its importance as a predator and prey (Mesopredator) in the food web

The Effect of Hydrological Connectivity on Fish Assemblages in a Floodplain System From the South-East Gulf of California, Mexico

Are the Temporal Changes Observed in the Reproductive Biology of the Estuarine Conguito Sea Catfish Related to Increased Small‐Scale Fishing Effort on the Northwestern Pacific Coast of Mexico?

Contact Info

Product

Resources

About