Acanthurus monroviae Steindachner, 1876

Triay-Portella, Raül, Pajuelo, José G., Manent, Pablo, Espino, Fernando, Ruiz-Díaz, Raquel, Lorenzo, José M. & González, José A., 2015, New records of non-indigenous fishes (Perciformes and Tetraodontiformes) from the Canary Islands (north-eastern Atlantic), Cybium 39 (3), pp. 163-174 : 169

Acanthurus monroviae Steindachner, 1876 , Monrovia doctorfish

Material examined. – Four specimens, dike Reina Sofía, 28°07’N 15°24’W, 21 m, 21 Mar . 2015, rocky breakwater: MMF44370 , one immature female, 251 mm TL, 195 mm SL ( Fig. 2J ); MMF44371 , one immature male, 242 mm TL, 184 mm SL; TFMCBM-VP/1950, one immature female, 235 mm TL, 176 mm SL; TFMCBM-VP/1951, one immature male, 228 mm TL, 174 mm SL. Two specimens, off La Isleta, 28°10’N 15°24’W, 20 m, rocks: ICCM402 , one unsexed adult, 350 mm TL, 239 mm SL, 13 Jul. 2013; ICCM403 , one spawning male, 392 mm TL, 286 mm SL, 18 Apr. 2015.

Sightings and catches. – Three times, n = 5: dike Reina Sofía, 21 m, rocky breakwater; off La Isleta, 19-37 m, rocks ( Fig. 3 ).

Remarks. – A tropical demersal species, living from 5 to 200 m of depth ( Desoutter, 1990), usually at 5-40 m, between 20 and 25°C ( Baensch and Debelius, 1997). Found on rocky and coral bottoms ( Schneider, 1990). It is also a brackish coastal species found in the mouth of rivers and lagoons ( Desoutter, 1990). Feeds on zooplankton, phytoplankton and detritus ( Diouf, 1996). Maximum length published is 450 mm SL ( Randall, 1981). It is firstly an eastern Atlantic species: from Portugal ( Costa and Gonçalves, 2013, at 38.43°N in December 2007) and Morocco to Angola, including the Cape Verdes ( Franca and Vasconcelos, 1962; Wirtz et al., 2013; Hanel and John, 2015) and São Tomé Island ( Osório, 1891; Afonso et al., 1999; Wirtz et al., 2007). Recently reported from the West Atlantic: Brazil ( Luiz-Júnior et al., 2004).

A. monroviae was first reported from the Canaries by Brito (1991) based on five individuals caught at the Port of Santa Cruz de Tenerife. Brito et al. (2002) reported on several sightings and another four individuals caught in Gran Canaria. One more observation was reported off El Cabrón Beach in August 2014 by Espino et al. (2014).

Figures

Figure 2. - Non-native species introduced to the Canaries. A: Holocentrus adscensionis; B: Cephalopholis taeniops; C: Paranthias furcifer; D: Prognathodes marcellae; E: Abudefduf saxatilis; F: Abudefduf hoefleri; G: Acanthurus bahianus; H: Acanthurus coeruleus; I: Acanthurus chirurgus; J: Acanthurus monroviae; K: Cantherhines pullus. Scale bars = 5 cm.

Figure 3. - Collection locations for the new records from the Canaries. 1: Holocentrus adscensionis, 2: Cephalopholis taeniops, 3: Paranthias furcifer, 4: Prognathodes marcellae, 5: Abudefduf saxatilis, 6: Abudefduf hoefleri, 7: Acanthurus bahianus, 8: Acanthurus coeru- leus, 9: Acanthurus chirurgus, 10: Acanthurus monroviae, 11: Cantherhines pullus.