Overview

Comprehensive Description

Description

Common names: clingfish (English), chalaco (Espanol), chupapiedra (Espanol)
 
Tomicodon abuelorum Szelistowski, 1990

Grandparent's clingfish

Body relatively slender, elongate, head relatively slender (both viewed from above); 5-7 & 6-8 short, blunt rakers on 2nd  & 3rd  gill arches; front nostril without skin flap; 4-5 pairs of upper & 4 pairs of lower 3-pointed incisors, followed by 1-3 & 1-2 large canines, respectively, on each side; anus notably nearer origin of anal fin than sucker; pectoral 21-24 rays; only a small fleshy swelling at pectoral base; sucker disc with broad patch of papillae at front, no papillae in center, 4-5 rows of papillae across rear section; dorsal relatively long 10-12 rays; anal 8-10 rays; tail 10-12 rays. 


Translucent light olive above; 4-5 dark lines radiate from eye - to snout, to corner of mouth, behind eye; large dark spot on flank above pectoral base, often bordered at front by same-sized white spot; ~15 narrow brown bars, some in form of a Y, on body between pectoral and tail base, front bars oblique; all fins except pelvics with numerous small spots, concentrated along rays of pectoral; base of tail fin dark.

Size: 4.2 cm.

Habitat: mangrove roots.

Depth: 0-5 m.

El Salvador to Panama.

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Biology

Found in areas with mangrove prop roots, usually attached to, or moving about and feeding from, root surfaces at high tide (Ref. 42103). Stomach contents contained barnacle cirri and barnacle cyprid larvae, Sphaeroma peruvianum, small oysters and other bivalves, amphipods, and harpacticoid copepods (Ref. 42103).
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Distribution

Range Description

This species is endemic to the Eastern Central Pacific, where it known from the Gulf of Nicoya, Costa Rica to Darien, in the Gulf of Panamá.
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Depth

Depth Range (m): 0 (S) - 5 (S)
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Zoogeography

See Map (including site records) of Distribution in the Tropical Eastern Pacific


 
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic

Regional Endemism: All species, TEP endemic, Continental TEP endemic, Panamic province endemic, Continent, Continent only

Residency: Resident

Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)

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Eastern Central Pacific: Costa Rica.
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 10 - 12; Analspines: 0; Analsoft rays: 8 - 10; Vertebrae: 29 - 31
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Size

Length max (cm): 4.2 (S)
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Size

Max. size

3.3 cm SL (male/unsexed; (Ref. 42103))
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Diagnostic Description

4 (4-5) pairs of trifid incisors in upper jaw, 4 pairs in lower jaw; anus markedly closer to anal fin origin than to rear of disc; dorsal-caudal distance forward passing tip of, usually extending to about middle of, pectoral fin; margin of anterior nostril without dermal flap (Ref. 42103). Nearly transparent, light olive; body markings quite variable in intensity, ranging from dark and distinct to light and indistinct, sometimes giving an overall mottled appearance (Ref. 42103).
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Type Information

Paratype for Tomicodon abuelorum Szelistowski
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Year Collected: 1984
Locality: Mangroves At Estero Punta Morales, Eastern Shore of the Gulf of Nicoya., Costa Rica, Pacific
  • Paratype: Szelistowski, W. A. 1990. Copeia. 1990 (2): 500.
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Paratype for Tomicodon abuelorum Szelistowski
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Year Collected: 1984
Locality: Mangroves At Estero Punta Morales, Eastern Shore of the Gulf of Nicoya., Costa Rica, Pacific
  • Paratype: Szelistowski, W. A. 1990. Copeia. 1990 (2): 500.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This benthic species is found only in areas with Rhizophora mangrove prop roots. It is usually attached to root surfaces or moving about and feeding from them at high tide (Szelistowski 1990). Juveniles have been recorded from floating mangrove leaves, which they may use as a dispersal mechanism into mangrove root systems. Stomach contents contained barnacle cirri and barnacle cyprid larvae, Sphaeroma peruvianum, small oysters and other bivalves, amphipods, and harpacticoid copepods (Szelistowski 1990).

Systems
  • Marine
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Habitat

Salinity: Brackish, Non Marine

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Bottom, Bottom only

Habitat: Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Soft bottom only, Estuary, Mangrove

FishBase Habitat: Demersal
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Environment

demersal; brackish; marine
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Trophic Strategy

Feeds mainly of mollusk and crustaceans at high tide (Ref. 42103).
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Feeding

Feeding Group: Carnivore

Diet: benthic microalgae, mobile benthic worms, mobile benthic crustacea (shrimps/crabs), mobile benthic gastropods/bivalves
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Life History and Behavior

Reproduction

Reproduction

Egg Type: Benthic, Pelagic larva
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
EN
Endangered

Red List Criteria
B1ab(i,iii)

Version
3.1

Year Assessed
2010

Assessor/s
Hastings, P., Dominici-Arosemena, A.

Reviewer/s
Carpenter, K., Polidoro, B., Livingstone, S. (Global Marine Species Assessment Team)

Contributor/s

Justification
This species is common in mangrove habitat throughout its range. However, based on the remaining mangrove habitat within its distribution in 2000, this species extent of occurrence is estimated to be less than 2,000 km², and is severely fragmented with continuing habitat decline due to ongoing mangrove extraction and coastal development. It is listed as Endangered under criterion B.
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Conservation status

IUCN Red List: Not evaluated / Listed

CITES: Not listed
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Population

Population
In suitable mangrove habitat, this is a common species. Szelistowski (1990) reported mean densities of 0.8-1.4 fish per mangrove root in his study area in the Gulf of Nicoya.

Population Trend
Decreasing
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Threats

Threats

Major Threats
The major threat to this species is extensive habitat loss from extraction of Rhizophora mangroves in Central American countries (Jiménez 1994). Surveys in other regions show that the reduction of mangroves brought some fish species to extinction (Ferreira et al. 2005). As of 2000, the area of mangroves remaining in Costa Rica (including the Atlantic coast) and Panama combined was estimated at around 2,000 km² (FAO 2007).
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Endangered (EN) (B1ab(i,iii))
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Management

Conservation Actions

Conservation Actions
The range of the species overlaps with several Marine Protected Areas, including Humedal de Importancia Internacional Punta Patiño, a 30,000 ha RAMSAR site (WDPA 2006). Improved protection of remaining mangrove habitat in the range of the species is urgently needed.
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