Habitat utilization by an invasive herbivorous fish (Siganus rivulatus) in its native and invaded range

Pickholtz, Renanel; Kiflawi, Moshe; Friedlander, Alan M.; Belmaker, Jonathan

doi:10.1007/s10530-018-1790-4

Cited by 27 publications

(20 citation statements)

References 79 publications

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“…Experimental work on the ecological impact of invaders exists only on the two highly abundant invasive herbivorous rabbitfish, Siganus luridus and Siganus rivulatus, which were shown to decimate erect algal meadows down to barrens along the Turkish coast (Sala et al 2011). These two highly influential Lessepsian migrants are small-to-medium-sized, schooling, generalist herbivores that were first recorded off the Israeli Mediterranean coast in 1924 (S. rivulatus) and 1955 (S. luridus), and since then have become highly abundant (Guy-haim et al 2017, Pickholtz et al 2018. Along the Israeli coast, rabbitfish comprise 95% of the herbivorous fish and one-third of the total fish biomass in rocky habitats (Lundberg et al 2004, Bariche 2006.…”

Section: Introductionmentioning

confidence: 99%

Ocean warming and tropical invaders erode the performance of a key herbivore

Yeruham

Shpigel

Abelson

et al. 2019

Ecology

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Citation: Yeruham, E., M. Shpigel, A. Abelson, and G. Rilov. 2020. Ocean warming and tropical invaders erode the performance of a key herbivore. Ecology 101(2):Abstract. Climate change and bioinvasions are two facets of global change that can act in tandem to impact native species and ecosystems. However, their combined effects on key species have rarely been studied. The Mediterranean Sea is a hot spot of both ocean warming and bioinvasions, where their impact can be tested together. In recent years, the population of a key herbivore, the European purple sea urchin (Paracentrotus lividus), has virtually collapsed along the Israeli Mediterranean coast (southeastern Levant). Here, we used field and lab experiments to test two complementary hypotheses that may explain the urchin population collapse: (1) resource competition that may lead to competitive exclusion by invasive grazers (two Red Sea rabbitfishes) and (2) reduced performance due to ocean warming. An inclusion-exclusion in situ caging experiment revealed a strong negative impact of fish grazing on algal cover and on the urchin's gut content and gonado-somatic index (GSI). Laboratory experiments revealed a considerable negative impact of both elevated temperature and food deficiency on sea urchin respiration and GSI, and consequently on its energy budget and reproductive potential and, potentially, fitness. Such reduced reproductive capacity must have greatly lowered the sea urchin's population viability, contributing (and possibly even leading) to its collapse in the southeastern Levant in the past two decades. Urchin population declines are expected to spread to the west and north of the Mediterranean Sea following further warming and rabbitfish expansion. This study is the first to demonstrate the potential additive effects of ocean warming and implied competitive exclusion by an invader on a native species at its warm biogeographic distribution edge.

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Section: Introductionmentioning

confidence: 99%

Ocean warming and tropical invaders erode the performance of a key herbivore

Yeruham

Shpigel

Abelson

et al. 2019

Ecology

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“…It has long been stressed that scale is of great importance when assessing the effects of complexity on species diversity (Graham & Nash, 2013; Tews et al., 2004; Tokeshi & Arakaki, 2012). There is some evidence that species occupy larger home ranges in rocky reef than in coral reefs (Pickholtz et al., 2018). In addition, as mentioned above, many coral reef fishes are reliant on live coral cover and are considered site attached as they seldom move far from a specific coral area (Belmaker et al., 2009; Sale, 1971).…”

Section: Discussionmentioning

confidence: 99%

A review of seascape complexity indices and their performance in coral and rocky reefs

Lazarus

Belmaker

2021

Methods Ecol Evol

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Seascape complexity is an important driver of ecological processes in marine systems. Today, high‐resolution, multiscale bathymetric data are being collected due to rapid advances in marine technologies and image processing, drastically improving the detailed mapping of the physical structure of the seascape. However, these data are rarely synthesized to create comprehensive complexity estimates, and complexity is still mostly measured using a small set of simple indices. The aims of this study are to: (a) review existing seascape complexity indices and propose innovative indices designed to capture the marine organism perspective, (b) quantify the interrelationships among these complexity indices; (c) test the performance of these indices in explaining fish assemblage structure; and (d) provide R code to easily reproduce the indices. Seascape bottom topography for this study was quantified using digital depth recordings along transects in Mediterranean sub‐tropical rocky reefs and Red Sea tropical coral reefs. These were used to generate complexity indices that were then compared to visually surveyed fish assemblages. We found that several common indices captured similar complexity facets, while an innovative family of structural diversity indices, representing the diversity of physical elements, captured distinct complexity facets not represented by existing indices. No single index was consistently superior; however, vertical relief was consistently included as a top predictor of fish assemblage structure. Interestingly, the most commonly used index, rugosity, was a poor predictor. We suggest a new, distinct set of structural diversity indices that may explain considerable variation in fish assemblages. The results suggest that several indices may need to be combined to capture the full influence of complexity on marine diversity and caution against the use of a single ‘universal’ index. While bathymetric data are increasingly being collected at high resolutions and increasing scales, synthesizing these data requires the use of appropriate complexity indices. The guidelines and recommendations presented here, along with the supplemental R code, will facilitate progress towards a more complete representation of different complexity facets.

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“…One of the major concerns about invasive marbled spinefoot is the lack of information on its stock assessment in the Turkish Seas. Many studies (Stergiou, 1988; Bariche et al ., 2004; Moleana et al ., 2016) reported that Siganids are strong competitors in terms of feeding and adaptation and S. rivulatus was reported as an herbivorous species (Stergiou & Karpouzi, 2002; Bariche, 2006; Pickholtz et al ., 2018). Therefore, identifying the probable competition scenarios of the species against other local herbivores such as Sarpa salpa and juvenile fish is of crucial importance in terms of fisheries management and preserving the biodiversity.…”

Section: Discussionmentioning

confidence: 99%

Contribution to some biological aspects of invasive marbled spinefoot (Siganus rivulatus, Forsskål 1775) from the Turkish coast of southern Aegean Sea

2020

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Some biological aspects of marbled spinefoot (Siganus rivulatus) were determined from a southern Aegean Sea small-scale fishery. A total of 721 individuals were captured (335 females, 279 males and 87 immature) and sex ratio was found to be 1:1.27, female to male. Total lengths and ages of individuals ranged between 9.0–26.1 cm and 1–9 years. Asymptotic length (L∞), growth coefficient (K) and the theoretical age at zero length (t0) were estimated to be 27.7 cm, K = 0.162 y−1 and t0 = −1.87 y. Length at maturity value was determined as 16.6 cm for females and 16.84 cm for males. Although S. rivulatus is one of the target species for small-scale and recreational fishery in the Turkish coast of the southern Aegean Sea, especially in Gökova Bay, official landing data is lacking for Turkey. Results of the present study are of crucial importance for further fisheries management of this invasive species.

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Habitat utilization by an invasive herbivorous fish (Siganus rivulatus) in its native and invaded range

Cited by 27 publications

References 79 publications

Ocean warming and tropical invaders erode the performance of a key herbivore

Ocean warming and tropical invaders erode the performance of a key herbivore

A review of seascape complexity indices and their performance in coral and rocky reefs

Contribution to some biological aspects of invasive marbled spinefoot (Siganus rivulatus, Forsskål 1775) from the Turkish coast of southern Aegean Sea

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