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La pesca artesanal en Mallorca ha constituido desde antiguo una importante actividad humana. De las 273 embarcaciones de pesca existentes en la isla en el año 1872, 241 correspondían a la flota de artes menores. En la actualidad, la flota artesanal de Mallorca está compuesta por el 83 % de los barcos de la flota pesquera de la isla (n = 383), con un tonelaje total de 1397 trb y una potencia total de 15.280 caballos de vapor. La pesquería que desarrollan es multiespecífica, explotando especies de alto valor comercial consumidas en su mayor parte en el mercado local. Las pesquerías más importantes para esta flota son las de jonquillo Aphia minuta (Risso, 1810), de diciembre a marzo; sepia Sepia ojficina/is (Linnaeus, 1758), de febrero a mayo; langosta roja Palinurus elephas (Fabricius, 1787), de marzo a agosto, y llampuga Coryphaena hippurus (Linnaeus, 1758), de agosto a diciembre. Estas pesquerías se caracterizan por su estacionalidad y por requerir el uso de artes específicos y variaciones en la actividad de la flota. La pesca de jonquillo va dirigida al góbido Aphia minuta, que suele ir acompañado en pequeña proporción por especies de góbidos afines como Pseudaphia ferreri (De Buén y Fage, 1908) y Cristallogobius linearis (Von Düben, 1845). La denominación de jonquillo es puramente comercial y se utiliza cuando la especie dominante (más del 80 %) es el A. minuta. Estas especies, agrupadas en la subfamilia Sycidiaphinae, se diferencian del tipo general, definido como subfamilia Gobiinae, por el hecho de conservar durante toda su vida, muy breve y nunca superior al año, caracteres juveniles como el tamaño reducido de los adultos (no superan los 50 mm de talla en esta zona), la adaptación a la vida planctónica (salvo para la reproducción) y la transparencia del cuerpo. [Ver Resumen completo en pdf]., Artisanal fishing has been an important activity in Majorca since ancient times. Of the 273 fishing boats based in Majorca in 1872, 241 corresponded to the small-scale fleet. At the present time, 83 % of the boats from the island's fishing fleet (n = 383) correspond to the Majorcan artisanal fleet, with a total tonnage of 1.397 GRT and a total power of 15.280 h.p. They work in a multispecific fishery, exploiting species of high commercial value that are consumed largely on the local market. The most important fisheries for this fleet are those directed at jonquillo, or transparent goby Aphia minuta (Risso, 1810), from December to March; cuttlefish Sepia officinalis (Linnaeus, 1758) from February to May; common spiny lobster Palinurus elephas (Fabricius, 1787) from March to August and dolphinfish Coryphaena hippurus (Linnaeus, 1758) from August to December. These fisheries are characterised by their seasonality and the requirement to use specific methods for each one, thus varying the fleet's activities. Jonquillo fishing is aimed at the goby Aphia minuta, which is usually accompanied by species of similar gobies, such as Pseudaphia ferreri (De Buén y Fage, 1908) and Cristallogobius linearis (Von Düben, 1845). The name jonquillo is purely commercial and is used when the dominant species (more than 80 %) is A. minuta. These species, grouped in the Sycidiaphinae subfamily, are differentiated from the common type, defined as the Gobiinae subfamily, by the fact that they maintain juvenile characters (neotenics) —such as the reduced size of the adults (not greater than 50 mm in this zone), adaptation to a planktonic life (except for reproduction) and a transparent body— during their whole life, which is very short, never more than a year. [See full Summary pdf].

During the pelagic fishing stations of the acoustics surveys Ecomed 91 and Ecomed 92, carried out in november 1991 and 92, series on sardine TS were collected using a SIMRAD EK-500 38 kHz split-beam echo sounder and echointegrator. Only data with similar features in bottom depth, trawling depth and % of capture were used. The Least-Mean-Square regression of mean TS on the logarithm of the mean fish length of the form TS=m1og(1}+b was finally applied to 11 data series giving m=29.73 and b=-74.08 with r =0.94 or, requiring that m=20, b=-63.34, which is higher than ot~ers to similars species but close to the Love's one. This could be explained for the trawling depth or for the short range of length analyzed.