Mangalitsa (Swallow-Belly Mangalitsa) Pig

Autochthonous pig breed is adapted to the specific local environment, fed with various locally available feedstuffs and well adapted to extensive conditions of housing. Their genes represent safety in the production of food in future times, in which the greater importance will be attributed to the resistance and adaptability of the breed. In terms of scientific substantiation, their performances and products are, as in the case of Mangalitsa pig, practically untapped. Thus, the aim of the present chapter is to present history and current status of Mangalitsa pig breed, its exterior pheno-typic characteristics, geographical distribution, production management and main products from this Serbian autochthonous breed of pigs, one of the local pig breeds investigated in the project TREASURE. Moreover, a collection and review of available literature data, available until August 2017, on reproductive and productive traits of Mangalitsa pig breed were carried out. Mangalitsa is a late and extremely fatty pig breed with low fertility, long suckling period and a very weak-slow growth. Although studies on Mangalitsa pig are scarce, the current review gives the first insight into this local pig breed.


History and current status of the breed (census)
Mangalitsa is an autochthonous fatty type pig breed, created from the old Serbian Šumadinka breed. During the nineteenth century, pigs were the main export product of Serbia, especially in the northern part of the country (today's Autonomous Province of Vojvodina) and in the region of Šumadija (central part of Serbia). In Šumadija, pigs were mostly fattened in the forests where they were searching for oak and beech acorn and other forest feed resources. The majority of animals were exported to the former Austro-Hungarian monarchy. In that time, the pig farming was based on local indigenous breeds with the dominant breeds Šiška and Šumadinka. Šiška and Šumadinka were the most primitive breed of pigs, created by domestication of wild pigs Sus scrofa ferus [1]. Šiška once had high importance, in the relatively recent past (eighteenth century), not only in Serbia but also in Croatia, Slovenia, Hungary, Romania and Bulgaria. In the nineteenth century, a new breed Šumadinka was created by domestication of wild pigs (Sus scrofa ferus) and reared in slightly

Exterior characteristics
The main morphological characteristics of the Mangalitsa breed are summarized in Table 1. It is a medium-size breed, known for its thick, wooly coat similar to that of a sheep. The three Mangalica breed types are blonde, swallow-belly and red Mangalitsa. Swallow-belly strain (Figures 2 and 3), which is one of the most numerous in Serbia, is late maturing type, resistant and well adapted to extensive rearing and housing conditions. It requires only a simple shelter from rain and snow. The head is relatively small, with large ears that hang in front over the eyes and face. The earlobe is set high and elastic to the touch. The ear length is 2/3 of the length of the head. The chest and short torso/body are broad and deep and extend to just below the elbow. The back and loin are straight or slightly curved from the side view. The back part of the body and thighs are well developed, wide and muscular. The abdomen is long and cylindrical with the mammary complex consisting of four to six pairs of teats [1]. Limbs are long, wide and muscular. The skin is pigmented, dark or brown in colour, with dense, bright and curly bristles that are shorter in swallow-belly strain. The colour of bristles can be from grey-yellow to reddish (ginger). The eyelids, eyebrows, muzzle, nipples of the mammary complexes, hooves, tail tip and natural openings on the body are always black. Brinzej [3] states that there are two varieties of this type, of which one from the western breeding region is called "Buđanovac" variety named after the village Buđanovci. This variety has a greater part of the body pigmented (entire head, body and the sides of the body and the legs from the outer-lateral side to the claws). The second variety-"Otok" and "Lasa" named after the village of Otok in the western part of the Srem region-with the legs pigmented only to the hock joint and the lower part of the papilla is white. The Otok variety has regularly strongly developed bristles, which the "Buđanovac" variety lacks or is less developed. At birth, piglets have characteristic stripes, which disappear in 10 days in white strain piglets and in 3-4 months in swallow-belly strain.

Geographical location and production system
Mangalitsa pigs are reared in the wider area of the Republic of Serbia, mostly along major waterways. Farms are located in the municipalities of Subotica, Sremska Mitrovica, Bačka Palanka, Vršac, Pančevo, Ub, Obrenovac, Ljig, Valjevo, Novi Sad, Kuzmin, Šid, Surčin and Kovilj (Krčedinska ada). Some Mangalica pigs can also be found on Stara Planina mountain (Municipality of Dimitrovgrad) and around Čačak and Kraljevo.
These pigs are usually reared in free-range conditions, outdoor, extensive or in semi-intensive production systems. Rearing of pigs implies a free holding in limited areas in pastures, woods or orchards. In extensive system, pigs are kept around the household, which depends on the number of animals and size of the owner's property, and in the winter period, animals are housed in cheap, wooden pig stables. Feeding them is primarily based on pasture and forest products (oaks, wild fruits). Additional daily meal represents an extremely small amount of grains per head, primarily corn. In extensive system sows very frequently farrow in the forest, which significantly complicates the control of productivity and recording. In semiintensive conditions, sows are farrowed in objects, which allows for better control. In the growing and fattening phase, pigs are mostly outdoor.

Organizations for breeding, monitoring and conservation
Organization for breeding is regulated by the Law on Livestock [4]. The Institute of Animal Husbandry and University of Novi Sad, Faculty of Agriculture, are the authorized main breeding organization for selection and animal recording of breeding livestock in Serbia.
Information on population status in the last 20 years is collected by the organizations shown in Table 2. The law of incentives in agriculture and rural development defines the maximum amounts of incentives per head for breeding gilts, boars and sows of Mangalitsa, Moravka and Resavka [5]. Protection includes in situ and ex situ preservation. The number of breeders of indigenous breeds of pigs is increasing in the last year. Ex situ preservation is regulated by the rule book on incentives for the conservation of animal genetic resources in the gene bank [6].

Growth performance
The basic data on growth performance obtained in this review are presented in Tables 4 and 5. Due to big differences between studies with regard to the live weight range covered, we defined the stages for growth performance as lactation (regardless of how long it was), growing stage (from weaning to approximately 30 kg live body weight) and early, middle and late fattening stages estimated between approximately 30 and 60 kg, 60 and 100 kg and above 100 kg live body weight, respectively. Sometimes the source provided only the overall growth rate for the whole fattening stage (defined as overall) or even from birth to slaughter (defined as birth-slaughter, which is often calculated from the data given on live weight and age of pigs). It should also be noted that a big part of the collected studies simulated practical conditions of the production systems used and that only a smaller part of the studies actually aimed at evaluating the breed potential for growth. In the considered studies, the daily gain in the early growing stage that corresponds to lactation period was approximately 136 g/day [9, 12, 14 -16]. The average daily gain in growing stage was 310 g/day [16]; 430, 519 and 405 g/day in early, middle and late fattening stage [12]; 434 g/day in overall fattening stage [12,15,16,18,[20][21][22]; and 307 g/day [15,16,21] from birth to slaughter. In the context of the evaluation of growth performance, it is also of interest to observe the extreme values, because it can be assumed that the maximum figures exhibit the growth potentials of Mangalitsa pigs in ad libitum conditions of feeding (≈830 g/day in overall fattening stage [20]     In the considered studies, the information on feed intake and feed nutritional value were given only in one study [12], which limits the evaluation of growth potential. The average daily feed intake increased from 2.0 kg/day in the early fattening stage to 3.2 kg/day in the late fattening stage.

Body composition and carcass traits
The basic data obtained in this review with some of the most commonly encountered carcass traits that could be compared are presented in Table 6. In the considered studies, pigs of the Mangalitsa breed were slaughtered at approximately No. = number, ADG = average daily gain in g, Ad lib = ad libitum feeding regime, Rest = restrictive feeding regime. 1 ADG in a period of lactation regardless of how long it was. 2 ADG in a growing period estimated from weaning to approximately 30 kg live body weight. 3 ADG in a period of fattening is reported for early, middle and late fattening stages estimated between approximately 30 and 60 kg, 60 and 100 kg and above 100 kg live body weight, respectively. Sometimes the source provided only the overall growth rate for the whole studied period (in that case defined as overall). No. = number, ADFI = average daily feed intake in kg/day, Ad lib = ad libitum feeding regime, ME = metabolisable energy, CP = crude protein. 1 ADFI in a period of fattening is reported for early, middle and late fattening stages estimated between approximately 30 and 60 kg, 60 and 100 kg and above 100 kg live body weight, respectively. Sometimes the source provided only the overall daily feed intake for the whole studied period (in that case defined as overall). 114 kg live weight [12,15,[20][21][22][23][24][25][26][27][28]. Dressing yield ranged from 73 to 80% [12,[24][25][26][27][28] and lean meat content 28 to 37% (SEUROP classification or dissection [19,[22][23][24][25]). The backfat thickness values measured at the level of the last rib span from 42 to 81 mm [12,[20][21][22][23][24][25], at the position of withers from 59 to 102 mm [12,[20][21][22][23][24] and at the level of gluteus medius muscle from 48 to 79 mm (n = 8). Muscularity measured as loin eye area was 24 cm 2 [22,23] and as muscle thickness measured from the vertebral canal to the cranial edge of gluteus medius muscle around 60 mm [12,22].

Use of breed and main products
Mangalitsa is a late maturing pig breed, selected for fat production. It has low fertility, long suckling period and a very weak-slow growth. But on the other hand, Mangalitsa is very resistant and well adapted to extensive conditions of housing, where the needs are only for a simple shelter from rain and snow. With such features, its cost-effectiveness is in low investment in housing facilities with large areas for pasturing and acorn nutrition, preferably if an organic breeding system is possible. Considering the low production performance (low daily gain and meatiness), crossbreeding with the Moravka, Resavka, Duroc, Hampshire or Berkshire breed could contribute to an improvement of growth and carcass traits, with the shorter fattening period and higher percentage of meat content in the carcass. The study of Radović et al. [22] showed not significantly better growth rate between Mangalitsa and Mangalitsa Â Moravka crossbreeds (average daily gain, 267.9 vs. 336.9 g) and similarly not significant content of meat in carcass sides (33.2 vs. 33.9%). The animals not chosen for the nucleus herd could be crossed with Duroc, Hampshire or Berkshire which would contribute to more economical production of meat and the production of traditional high-value products (ham, sremski kulen   and Sremska sausages) and their marketing as highly valuable organic products or products protected by a geographical indication. Dry-fermented sausages are meat products with a very long tradition of production, and today there are numerous national variants of these products. The most popular types of traditional fermented sausages in Serbia are kulen [37] and Sremska sausage. Kulen, a traditional fermented dry sausage, is a well-known and very popular meat product in the north of Serbia (Srem, Bačka) and Croatia (Slavonia, Baranja). For all variants of basically the same product, high-quality meat from mature pigs with a relatively low water content, intensive red colour and firm consistency is used as raw material. The meat used is primarily from the leg, shoulder and possibly some parts of the neck; a small amount of firm backfat tissue is also used (muscle and adipose tissue; 75:25 [33]).
Smoking and maturation of sausages were carried out in the winter period (December to February). Sremska sausage is a Serbian dry-fermented sausage traditionally produced in the north-western part of Serbia (Srem region), where it was produced in village households. It was made of grounded (about 8 mm) pig meat and backfat and mixed with salt and spices. The mixture was filled into pig's small intestines, smoked and dried for 14-21 days depending on ambient conditions [34]. Sremska sausage is of pronounced red colour, tender texture and slightly hot taste, with a fermented meat odour and a mild note of spices and smoke [35,36]. The meat and adipose tissue as well as meat products of Mangalitsa are much appreciated by the Serbian consumers; the scientific efforts were not only limited to preserve the breed as such but also to better exploit its potential for human consumption.